Letter Envelopes

LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes, Smoke Gray, 50/Pack~#|#~m000081283_sc7
Item: 281894
Model: EX7716-22-50
No reviews yet
Price is $30.49
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Seafoam Blue, 500/BX~#|#~m005824022_sc7
Item: 517493
Model: LUX-4860-113500
No reviews yet
Price is $101.29
Free delivery by Wed, Jul 22
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JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", Baby Blue, 25/Pack (3961300)~#|#~m003904856_sc7JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", Baby Blue, 25/Pack (3961300)~#|#~m003904855_sc7
Item: 261366
Model: 3961300
Price is $14.89
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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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
Price is $92.89
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Bronze Metallic, 250/BX~#|#~m004940419_sc7LUX 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
Price is $87.99
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (25048I)~#|#~m002934135_sc7JAM 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
Price is $22.99
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (67161I)~#|#~sp112110506_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (67161I)~#|#~sp112110505_sc7
Item: 1588624
Model: 67161I
Price is $16.99
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Limelight (LUX-4260-101-50)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Limelight (LUX-4260-101-50)~#|#~sp12275029_sc7
Item: 24162015
Model: LUX-4260-101-50
No reviews yet
Price is $18.69
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX #10 Window Envelopes, 4 1/8" x 9 1/2", 24 lb. White, Machine Insertable, 250 Qty (28460-MI-250)~#|#~m004064026_sc7
Item: 2146394
Model: 28460-MI-250
No reviews yet
Price is $56.69
Unit of measure 250/Pack
Free delivery by Wed, Jul 22
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, 70lb. Bright White (4860-70W-50)~#|#~sp14807393_sc7
Item: 24260394
Model: 4860-70W-50
No reviews yet
Price is $16.49
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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JAM Paper #10 Business Colored Envelopes, 4.125 x 9.5, Ultra Fuchsia Pink, Bulk 500/Box (15847H)~#|#~m003904529_sc7JAM Paper #10 Business Colored Envelopes, 4.125 x 9.5, Ultra Fuchsia Pink, Bulk 500/Box (15847H)~#|#~m003904528_sc7
Item: 1589650
Model: 15847H
No reviews yet
Price is $155.59
Unit of measure 500/Box
Free delivery by Wed, Jul 22
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JAM Paper #10 Policy Metallic Business Envelopes, 4.125 x 9.5, Stardream Gold, 50/Pack (1261602I)~#|#~m003904738_sc7JAM Paper #10 Policy Metallic Business Envelopes, 4.125 x 9.5, Stardream Gold, 50/Pack (1261602I)~#|#~m003904737_sc7
Item: 1588585
Model: 1261602I
No reviews yet
Price is $39.99
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Teal Blue, 25/Pack (63924024)~#|#~sp132864328_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Teal Blue, 25/Pack (63924024)~#|#~sp132864327_sc7
Item: 1227786
Model: 63924024
No reviews yet
Price is $19.49
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 25/Pack (15847)~#|#~m003904529_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 25/Pack (15847)~#|#~m003904528_sc7
Item: 263898
Model: 15847
Price is $20.49
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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JAM Paper #10 Policy Business Colored Envelopes, 4 1/8" x 9 1/2", Orange Recycled, 25/Pack (15887)~#|#~m003904556_sc7JAM Paper #10 Policy Business Colored Envelopes, 4 1/8" x 9 1/2", Orange Recycled, 25/Pack (15887)~#|#~m003904555_sc7
Item: 261230
Model: 15887
No reviews yet
Price is $14.89
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 250 Pack (4860-SG-250)~#|#~sp226423810_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 250 Pack (4860-SG-250)~#|#~sp226423809_sc7
Item: 24578400
Model: 4860-SG-250
No reviews yet
Price is $64.99
Unit of measure 250/Pack
Free delivery by Wed, Jul 22
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Sunflower (LUX-4260-12-50)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Sunflower (LUX-4260-12-50)~#|#~sp12275007_sc7
Item: 24162051
Model: LUX-4260-12-50
Price is $39.09
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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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
Price is $220.19
Free delivery by Wed, Jul 22
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Quality Park Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 1000/Carton (QUA90020B)~#|#~sp40322437_sc7Quality Park Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 1000/Carton (QUA90020B)~#|#~sp40322435_sc7
Item: QUA90020B
Model: QUA90020B
Price is $93.80
Unit of measure 1000/Carton
Free delivery by Tue, Jul 21
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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
Price is $166.69
Unit of measure 1000/Box
Free delivery by Wed, Jul 22
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JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Red, 25/Pack (1323307)~#|#~m000067476_sc7
Item: 260897
Model: 1323307
No reviews yet
Price is $41.89
Unit of measure 25/Pack
Free delivery by Wed, Jul 22
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JAM Paper #10 Policy Business Colored Envelopes, 4.125 x 9.5, Orange Recycled, Bulk 500/Box (15887H)~#|#~m003904556_sc7JAM Paper #10 Policy Business Colored Envelopes, 4.125 x 9.5, Orange Recycled, Bulk 500/Box (15887H)~#|#~m003904555_sc7
Item: 1589644
Model: 15887H
No reviews yet
Price is $202.99
Unit of measure 500/Box
Free delivery by Wed, Jul 22
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JAM Paper Peel & Seal #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 25/Pack (11789)~#|#~sp36388124_sc7JAM Paper Peel & Seal #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 25/Pack (11789)~#|#~sp36388044_sc7
Item: 263862
Model: 11789
Price is $10.29
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Violet Purple, 50/Pack (15864I)~#|#~sp112110499_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Violet Purple, 50/Pack (15864I)~#|#~sp112110498_sc7
Item: 1590445
Model: 15864I
Price is $20.49
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Anthracite Metallic Gray, 50/Pack~#|#~m004940420_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Anthracite Metallic Gray, 50/Pack~#|#~m005823900_sc7
Item: 281914
Model: 5360-15-50
No reviews yet
Price is $27.95
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 60lbs. Bright Regular Envelopes, Blue, 50/Pack~#|#~m000081290_sc7
Item: 281901
Model: 4260-18-50
Price is $45.19
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Vista Metallic Blue, 500/BX~#|#~m000081324_sc7
Item: 385050
Model: 5360-29-500
No reviews yet
Price is $179.49
Unit of measure 500/Box
Free delivery by Wed, Jul 22
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Avocado Green, 500/BX~#|#~m000081265_sc7
Item: 386994
Model: EX7716-27-500
No reviews yet
Price is $201.99
Unit of measure 500/Box
Free delivery by Wed, Jul 22
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Electric Cherry (WS-2995-250)~#|#~sp5822112_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Electric Cherry (WS-2995-250)~#|#~sp5873624_sc7
Item: 23996109
Model: WS-2995-250
No reviews yet
Price is $44.89
Unit of measure 250/Pack
Free delivery by Wed, Jul 22
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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
Price is $214.59
Unit of measure 500/Box
Free delivery by Wed, Jul 22
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Business Envelopes W/Peel & Press, Magenta Pink, 250/BX~#|#~m004940454_sc7LUX 70lbs. 4 1/8" x 9 1/2" #10 Business Envelopes W/Peel & Press, Magenta Pink, 250/BX~#|#~m005823998_sc7
Item: 386315
Model: EX4860-10-250
No reviews yet
Price is $108.49
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Crystal Metallic, 50/Pack~#|#~m004940428_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Crystal Metallic, 50/Pack~#|#~m005823906_sc7
Item: 281920
Model: 5360-30-50
No reviews yet
Price is $40.09
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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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
Price is $21.09
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 1000/Pack, Navy (LUX42601031000)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 1000/Pack, Navy (LUX42601031000)~#|#~sp12275019_sc7
Item: 24161971
Model: LUX42601031000
Price is $166.09
Unit of measure 1000/Pack
Free delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Gold Metallic~#|#~m004940416_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Gold Metallic~#|#~m005823910_sc7
Item: 281925
Model: 5360-07-50
Price is $42.99
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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JAM Paper #10 Business Foil Envelopes with Peel & Seal Closure, 4 1/8" x 9 1/2", Black, 100/Pack (01327704B)~#|#~sp137085716_sc7
Item: 260952
Model: 01327704B
No reviews yet
Price is $137.79
Unit of measure 100/Box
Free delivery by Wed, Jul 22
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JAM Paper Self Seal Policy Envelope 4 1/8" x 9 1/2", Natural Linen, 50/Pack (7716-NLI-50)~#|#~FC7B9E63-6939-4320-9110C68A66F9926D_sc7JAM Paper Self Seal Policy Envelope 4 1/8" x 9 1/2", Natural Linen, 50/Pack (7716-NLI-50)~#|#~5EA03894-4924-41B6-A88F8C44718A3AC0_sc7
Item: 24604592
Model: 7716-NLI-50
No reviews yet
Price is $13.95
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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Over 30
LUX #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) 50/Pack, Navy (LUX-4860-103-50)~#|#~sp14807379_sc7
LUX #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) 50/Pack, Navy (LUX-4860-103-50) is Out of stock
Item: 24260395
Model: LUX-4860-103-50
Price is $22.69
Unit of measure 50/Pack
LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Baby Blue (EX4860-13-50)~#|#~sp14807369_sc7
LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Baby Blue (EX4860-13-50) is Out of stock
Item: 24260916
Model: EX4860-13-50
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Price is $25.19
Unit of measure 50/Pack
Bazic Kraft Self Seal Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", 500/Pack (BAZ5064)~#|#~sp151423994_sc7
Bazic Kraft Self Seal Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", 500/Pack (BAZ5064) is Out of stock
Item: 24516828
Model: BAZ5064
No reviews yet
Price is $43.09
Unit of measure 500/Pack

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.