Sponsored Products
LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Natural, 250/BX~#|#~m000161321_sc7
Item # : 385681
Model # : 7716-N-250
No reviews yet
LUX® Size 10 open end envelop in natural color measuring 4 1/8" x 9 1/2" is perfect for storing bulky materials or multiple small items and is sold as 250 per box.
  • #10 Open End Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Natural, 70lb. Text Paper
Price is $90.59
Unit of measure 250/Box
Free delivery by Wed, Jun 11
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JAM Paper #10 Policy Business Strathmore Envelopes, 4.125 x 9.5, Natural White Wove, 25/Pack (191249)~#|#~m007063366_sc7
JAM Paper #10 Policy Business Strathmore Envelopes, 4.125 x 9.5, Natural White Wove, 25/Pack (191249)~#|#~m007049471_sc7
Item # : 262548
Model # : 191249
JAM Paper® Size 10 Policy strathmore natural white wove envelope in a pack of 25 is perfect for greeting cards, invitations or any other announcements and is 25% cotton.
  • Size: #10 (4 1/8" x 9 1/2")
  • Closure: Gum
Price is $14.49
Unit of measure 25/Pack
Delivery by Fri, Jun 06
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 25/Pack (900926651)~#|#~sp134498373_sc7
JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 25/Pack (900926651)~#|#~sp134498372_sc7
Item # : 261878
Model # : 900926651
JAM Paper® Size #10 Natural parchment paper envelope in a pack of 25 is perfect for greeting cards, invitations, weddings or any announcements and is made from 30% post consumer recycled fiber.
  • Size: #10 (4 1/8" x 9 1/2")
  • Closure: Gum
Price is $19.99
Unit of measure 25/Pack
Delivery by Fri, Jun 06
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes W/Peel&Press, White, 1000/BX~#|#~m000211244_sc7
Item # : 515066
Model # : 7716-WPC-1000
No reviews yet
LUX 80lb. White - 100% Recycled #10 Open End Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • 1000/box
  • White
Price is $338.49
Free delivery by Wed, Jun 11
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes W/Glue, Smoke Gray, 250/BX~#|#~m000081283_sc7
Item # : 386958
Model # : EX7716-22-250
No reviews yet
LUX® Size 10 open end envelop in smoke color measuring 4 1/8" x 9 1/2" is perfect for storing bulky materials or vivid small items and is sold as 250 per box.
  • #10 Open End Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Smoke, 80lb. Text Paper
Price is $115.94
Unit of measure 250/Box
Free delivery by Wed, Jun 11
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Sunflower Yellow, 500/BX~#|#~m000081284_sc7
Item # : 386917
Model # : EX7716-12-500
No reviews yet
LUX® Size 10 open end envelop in sunflower color measuring 4 1/8" x 9 1/2" is perfect for storing bulky materials or multiple small items and is sold as 500 per box.
  • Sunflower
  • Size: #10 (4 1/8" x 9 1/2")
Price is $204.19
Unit of measure 500/Box
Free delivery by Wed, Jun 11
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LUX 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Crystal Clear, 1000/BX~#|#~m000161313_sc7
Item # : 385993
Model # : CC10-1000
No reviews yet
LUX® Size 10 square flap envelope in crystal clear color measuring 4 1/8" x 9 1/2" forms an ideal choice for personal or corporate business use and is sold as 1000 per box.
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in 5 Mil Crystal Clear, 3. Text Paper
Price is $268.49
Unit of measure 1000/Box
Free delivery by Wed, Jun 11
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LUX #10 Square Flap (4 1/8 x 9 1/2) 50/Pack, Champagne Metallic (5360-M08-50)~#|#~sp14807455_sc7
Item # : 24260283
Model # : 5360-M08-50
No reviews yet
LUX #10 Square Flap (4 1/8 x 9 1/2) in Champagne Metallic are perfect for mailing Checks, Invoices, Letterhead, Personal Letters, Statements, Direct Mail and more!
  • Dimensions: 4.125"L x 9.5"W
  • Comes in Champagne Metallic
Price is $19.99
Unit of measure 50/Pack
Delivery by Wed, Jun 11
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Clear Translucent (4860-00-50)~#|#~sp14807391_sc7
Item # : 24260570
Model # : 4860-00-50
No reviews yet
LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) in Clear Translucent are perfect for mailing Checks, Invoices, Letterhead, Personal Letters, Statements, Direct Mail and more!
  • Dimensions: 4.125"L x 9.5"W
  • Comes in Clear Translucent
Price is $24.49
Unit of measure 50/Pack
Delivery by Wed, Jun 11
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Red, 25/Pack (67161)~#|#~sp112110506_sc7
JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Red, 25/Pack (67161)~#|#~sp112110505_sc7
Item # : 260833
Model # : 67161
JAM Paper® #10 Christmas Red recycled paper envelope. Perfect for greeting cards, invitations, weddings or any announcements and is made from 30% post consumer paper. Pack of 25.
  • Christmas red
  • Size: #10 (4 1/8" x 9 1/2")
Price is $19.99
Unit of measure 25/Pack
Delivery by Fri, Jun 06
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Bronze Metallic, 250/BX~#|#~m004940419_sc7
LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Bronze Metallic, 250/BX~#|#~m005823903_sc7
Item # : 384997
Model # : 5360-12-250
No reviews yet
LUX® Size 10 square flap envelope in bronze metallic color of measuring 4 1/8" x 9 1/2" forms the right choice for personal or corporate business use and is sold as 250 per box.
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Bronze Metallic, 80lb. Text Paper
Price is $104.91
Unit of measure 250/Box
Free delivery by Wed, Jun 11
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JAM Paper #10 Metallic Business Envelopes, 4.125 x 9.5, Stardream Gold, 25/Pack (SD5360 07)~#|#~m003905201_sc7
JAM Paper #10 Metallic Business Envelopes, 4.125 x 9.5, Stardream Gold, 25/Pack (SD5360 07)~#|#~m003905200_sc7
Item # : 261972
Model # : SD5360 07
No reviews yet
JAM Paper® Size 10 Stardream metallic envelopes in a carton of 25 are designed in gold color with extra shine and features square gummed flap.
  • Size: #10 (4 1/8" x 9 1/2")
  • Closure: Gum
Price is $24.79
Unit of measure 25/Pack
Delivery by Fri, Jun 06
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JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Blue, 25/Pack (PACV357)~#|#~m003905168_sc7
JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Blue, 25/Pack (PACV357)~#|#~m003905167_sc7
Item # : 262213
Model # : PACV357
No reviews yet
JAM Paper® Size #10 Primary Blue translucent envelope in a pack of 25 is perfect for invitations, greeting cards or any announcements and has overall dimension of 4 1/8" x 9 1/2".
  • Size: #10 (4 1/8" x 9 1/2")
  • Closure: Gum
Price is $22.69
Unit of measure 25/Pack
Delivery by Fri, Jun 06
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JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (25048I)~#|#~m002934135_sc7
JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (25048I)~#|#~m002934134_sc7
Item # : 1588622
Model # : 25048I
No reviews yet
The JAM Paper #10 (4.13" x 9.5") recycled policy envelope makes a great option for sending out hand-written letters to your loved ones.
  • Product Type: Recycled Policy Envelope
  • Red recycled paper envelope
Price is $22.99
Unit of measure 50/Pack
Delivery by Fri, Jun 06
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Natural, 500/BX~#|#~m000161374_sc7
Item # : 513623
Model # : 4860-NPC-500
No reviews yet
LUX® Square flap envelope in natural color measures #10 (4 1/8" x 9 1/2") and contains 100 percent recycled content which is ideal for personal or corporate business, sold as 500 per box.
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Natural - 100% Recycled, 80lb. Text Paper
Price is $143.79
Free delivery by Wed, Jun 11
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Bronze Metallic, 50/Pack~#|#~m004940419_sc7
LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Bronze Metallic, 50/Pack~#|#~m005823903_sc7
Item # : 281917
Model # : 5360-12-50
No reviews yet
Lux® Size 10 square flap envelope in bronze metallic color is ideal for various types of personal or business related uses and measures 4 1/8" x 9 1/2".
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Bronze Metallic, 80lb. Text Paper
Price is $26.13
Unit of measure 50/Pack
Delivery by Wed, Jun 11
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 500/Box, 24lb. White Linen (WS-2960-500)~#|#~m004063955_sc7
Item # : 2146391
Model # : WS-2960-500
No reviews yet
LUX #10 Regular Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • #10 Regular Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in 24lb. White Linen, 24lb. Text Paper
Price is $132.79
Unit of measure 500/Pack
Free delivery by Wed, Jun 11
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JAM Paper #10 Business Strathmore Envelopes, 4.125 x 9.5, Bright White Laid, 50/Pack (191166I)~#|#~m002934323_sc7
JAM Paper #10 Business Strathmore Envelopes, 4.125 x 9.5, Bright White Laid, 50/Pack (191166I)~#|#~m002934322_sc7
Item # : 1588782
Model # : 191166I
No reviews yet
The JAM Paper #10 (4.13" x 9.5") strathmore laid envelope makes a great option for distributing official materials, sending mails or filing important papers.
  • Product Type: Strathmore Envelope
  • White recycled paper envelope
Price is $19.99
Unit of measure 50/Pack
Delivery by Fri, Jun 06
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Baby Blue (EX4860-13-50)~#|#~sp14807369_sc7
Item # : 24260916
Model # : EX4860-13-50
No reviews yet
LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) in Baby Blue are perfect for mailing Checks, Invoices, Letterhead, Personal Letters, Statements, Direct Mail and more!
  • Dimensions: 4.125"L x 9.5"W
  • Comes in Baby Blue
Price is $24.49
Unit of measure 50/Pack
Delivery by Wed, Jun 11
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 1000/Box, 24lb. White Linen (WS-2960-1M)~#|#~m004063955_sc7
Item # : 2146385
Model # : WS-2960-1M
No reviews yet
LUX #10 Regular Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • #10 Regular Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in 24lb. White Linen, 24lb. Text Paper
Price is $203.59
Unit of measure 1000/Pack
Free delivery by Wed, Jun 11
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JAM Paper #10 Invitation Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 1000/Carton (15847B)~#|#~m003904529_sc7
JAM Paper #10 Invitation Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 1000/Carton (15847B)~#|#~m003904528_sc7
Item # : 261197
Model # : 15847B
No reviews yet
JAM Paper® Size #10 Brite hue ultra fuchsia hot pink paper envelope is perfect for greeting cards, invitations, weddings or any announcement and has a square gummed flap.
  • Size: #10 (4 1/8" x 9 1/2")
  • Closure: Gum
Price is $242.69
Unit of measure 1000/Carton
Free delivery by Fri, Jun 06
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LUX 60lbs. 4 1/8" x 9 1/2" #10 Bright Regular Envelopes, Bright Blue, 1000/BX~#|#~m000081290_sc7
Item # : 384462
Model # : 4260-18-1000
No reviews yet
LUX® Size 10 regular envelope in bright blue color measuring 4 1/8" x 9 1/2" forms a perfect choice for personal or corporate business use and is sold as 1000 per box.
  • #10 Regular Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Bright Blue, 60lb. Text Paper
Price is $158.59
Unit of measure 1000/Box
Free delivery by Wed, Jun 11
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LUX #10 Window Envelopes, 4 1/8" x 9 1/2", 24 lb. White, Machine Insertable, 1000 Qty (28460-MI-1M)~#|#~m004064026_sc7
Item # : 2146382
Model # : 28460-MI-1M
No reviews yet
LUX #10 Window (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • #10 Window (4 1/8 x 9 1/2) are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in 24lb. White, Machine Insertable, 24lb. Text Paper
Price is $82.69
Unit of measure 1000/Pack
Free delivery by Wed, Jun 11
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Candy Pink, 500/BX~#|#~m004940458_sc7
LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Candy Pink, 500/BX~#|#~m005824001_sc7
Item # : 386325
Model # : EX4860-14-500
No reviews yet
LUX® Size 10 square flap envelope in candy pink color measuring 4 1/8" x 9 1/2" forms an ideal choice for personal or corporate business use and is sold as 500 per box.
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Candy Pink, 80lb. Text Paper
Price is $139.69
Unit of measure 500/Box
Free delivery by Wed, Jun 11
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 50/Pack (15859I)~#|#~sp111772364_sc7
JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 50/Pack (15859I)~#|#~sp111772363_sc7
Item # : 1588621
Model # : 15859I
The JAM Paper #10 (4.13" x 9.5") recycled envelope is stylish and can be used for mailing as well as filing.
  • Product Type: Recycled Business Envelope
  • Yellow recycled paper envelope
Price is $16.69
Unit of measure 50/Pack
Delivery by Fri, Jun 06
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LUX 60lbs. 4 1/8" x 9 1/2" #10 Regular Envelopes, Blue Parchment, 250/Box (6660-12-250)~#|#~m000081289_sc7
Item # : 385529
Model # : 6660-12-250
No reviews yet
LUX® Size 10 blue parchment regular envelope measuring 4 1/8" x 9 1/2" forms an ideal choice for personal or corporate business use and is sold as 250 per box.
  • #10 Regular Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Blue Parchment, 60lb. Text Paper
Price is $50.39
Unit of measure 250/Box
Free delivery by Wed, Jun 11
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes W/Peel&Press, White, 250/BX~#|#~m000211244_sc7
Item # : 515057
Model # : 7716-WPC-250
No reviews yet
LUX 80lb. White - 100% Recycled #10 Open End Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • 250/box
  • White
Price is $121.69
Free delivery by Wed, Jun 11
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Midnight Black, 250/BX~#|#~m004940475_sc7
LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Midnight Black, 250/BX~#|#~m005824009_sc7
Item # : 387486
Model # : F-4560-B-250
LUX® Size 10 square flap envelope in midnight black color measuring 4 1/8" x 9 1/2" forms a perfect choice for personal or corporate business use and is sold as 250.
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Midnight Black, 80lb. Text Paper
Price is $74.99
Unit of measure 250/Box
Free delivery by Wed, Jun 11
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes, Grocery Bag Brown, 50/Pack~#|#~m000081273_sc7
Item # : 281884
Model # : 7716-GB-50
No reviews yet
Lux® Size 10 open end envelope measures 4 1/8" x 9 1/2", is perfectly sized to send flat, heavy materials, numerous small items like coins, catalogs or jumbo cards and comes in grocery bag color.
  • #10 Open End Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Grocery Bag, 70lb. Text Paper
Price is $46.49
Unit of measure 50/Pack
Free delivery by Wed, Jun 11
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Wisteria Purple, 500/BX~#|#~m004940493_sc7
LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Wisteria Purple, 500/BX~#|#~m005824014_sc7
Item # : 517269
Model # : LUX-4860-106500
LUX 80lb. Wisteria #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • #10 Square Flap Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Wisteria, 80lb. Text Paper
Price is $147.69
Free delivery by Wed, Jun 11
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Navy Blue, 50/Pack~#|#~m000081279_sc7
Item # : 281890
Model # : LUX-7716-103-50
No reviews yet
LUX® Size 10 open end envelope in navy color measures 4 1/8" x 9 1/2" and is perfectly sized to send flat, heavy materials, numerous small items like coins, catalogs or jumbo cards.
  • #10 Open End Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Navy, 80lb. Text Paper
Price is $59.39
Unit of measure 50/Pack
Free delivery by Wed, Jun 11
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LUX 13lbs. 4 1/8" x 9 1/2" #10 Regular Envelopes, Airmail, 250/BX~#|#~m000161316_sc7
Item # : 385972
Model # : 92908-250
No reviews yet
LUX® Size 10 Airmail regular envelope measuring 4 1/8" x 9 1/2" has a paper weight of 13 lbs and is suitable for personal or corporate business, sold as 250 per box.
  • #10 Regular Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Airmail, 20lb. Text Paper
Price is $100.29
Unit of measure 250/Box
Free delivery by Wed, Jun 11
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LUX #10 Window Envelopes, 4 1/8" x 9 1/2", 24 lb. White, Machine Insertable, 50 Qty (28460-MI-50)~#|#~m004064026_sc7
Item # : 2146400
Model # : 28460-MI-50
No reviews yet
LUX #10 Window (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • #10 Window (4 1/8 x 9 1/2) are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in 24lb. White, Machine Insertable, 24lb. Text Paper
Price is $27.69
Unit of measure 50/Pack
Delivery by Wed, Jun 11
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LUX Peel & Seel Self Seal #10 Business Envelope, 4 1/2" x 9 1/2", White, 500/Pack  (75746-500)~#|#~sp14807440_sc7
Item # : 24260640
Model # : 75746-500
No reviews yet
LUX #10 Regular Envelopes (4 1/8 x 9 1/2) in White w/ Peel & Seel® are perfect for mailing Checks, Invoices, Letterhead, Personal Letters, Statements, Direct Mail and more!
  • Dimensions: 4.125"L x 9.5"W
  • Comes in White w/ Peel & Seel®
Price is $110.09
Unit of measure 500/Pack
Free delivery by Wed, Jun 11
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LUX Moistenable Glue Security Tinted #10 Business Envelope, 4 1/2" x 9 1/2", Bright Green, 500/Box (4260-12-500)~#|#~m000081292_sc7
Item # : 384428
Model # : 4260-12-500
LUX® Size 10 regular envelope in bright green color measuring 4 1/8" x 9 1/2" forms an ideal choice for personal or corporate use and is sold as 500 per box.
  • #10 Regular Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Bright Green, 60lb. Text Paper
Price is $110.09
Unit of measure 500/Box
Free delivery by Wed, Jun 11
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Pool Blue, 50/Pack~#|#~m000081280_sc7
Item # : 281891
Model # : LUX-7716-102-50
Lux® Size 10 open end envelope measures 4 1/8" x 9 1/2", is perfectly sized to send flat, heavy materials, numerous small items like coins, catalogs or jumbo cards and comes in pool color.
  • #10 Open End Envelopes are perfect for mailing checks/invoices/letterhead/personal letters/statements/direct mail
  • Comes in Pool, 80lb. Text Paper
Price is $52.39
Unit of measure 50/Pack
Free delivery by Wed, Jun 11
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Ampad Security Tinted #10 Window Envelope, 4 1/8" x 9 1/2", White, 500/Box (73047)~#|#~s0198475_sc7
Ampad Security Tinted #10 Window Envelope, 4 1/8" x 9 1/2", White, 500/Box (73047)~#|#~s0240858_sc7
Ampad Security Tinted #10 Window Envelope, 4 1/8" x 9 1/2", White, 500/Box (73047) is Out of stock
Item # : 706753
Model # : 73047
No reviews yet
  • #10 (4-1/8" x 9-1/2")
  • Gummed closure with commercial flap
Price is $36.49
Unit of measure 500/Box

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Letter envelopes are an essential office supply for any home or office. These standard, versatile envelopes can be used to mail letters, checks, documents and more. At Staples, you can buy letter size envelopes in bulk in packs of anywhere from 25 to 2,500. Learn about the different types of letter envelopes below.

What Are Letter Envelopes?

A letter envelope is a sealable paper envelope typically measuring 4 ⅛ inches by 9 ½ inches, also known as a #10 envelope. Letter envelopes are not meant to contain thick or heavy objects. Rather, they’re meant to hold paper and other thin, light and flat materials. A letter-size envelope is also often compatible with a printer for those who want to print addresses rather than write them by hand. These #10 envelopes are the perfect size for mailing letters or documents because they are not too small to be accepted by postal services and not too big to require extra postage.

Types of Letter Envelopes

Letter envelopes also come in several different styles, the most common of which are described below.

  • Environmentally Friendly Envelopes - These are made from recycled paper and are great for households or businesses that do a lot of mailing to reduce environmental impact.
  • Business Envelopes - These envelopes include a clear plastic window for parts of the documents inside to be made visible. These windows have securely gummed closures to ensure that the contents of the envelope stay protected.
  • Multi-Colored Envelopes - Letter envelopes come in a variety of color options, including beige, pink, yellow, green, purple and more.
  • V-Flap Envelopes - The standard letter envelope is designed with a rectangular adhesive flap, but triangular, or “v-flap,” adhesive flaps are also available and are commonly used with greeting cards and invitations.
  • Linen Envelopes - Some letter envelopes come with a linen finish to set your letter apart and add an elegant touch.

How Do I Mail a Letter Envelope?

Here are the steps needed to mail a classic #10 letter envelope:

  1. On the side without the seal, write or print the recipient's address in the middle with a legible pen (pencil marks can dull or rub off in transit). Write the sender’s address in the envelope’s top left corner.
  2. In the top right corner, you will need to place adequate postage for the envelope to reach its destination.
  3. With the material you want to send inside the envelope, seal it by adding a light amount of moisture to the adhesive flap. If you don’t prefer to use your tongue, you can use a moist sponge or cotton swab to do this. Alternatively, you can even use tape or glue sticks to seal envelopes. Some letter envelope varieties are self-seal or peel-and-seal and are able to seal on their own without needing added moisture.
  4. Place the envelope in a USPS mailbox or bring it to a post office.