Letter Envelopes

LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Holiday Green (LUX-4860-L17-50)~#|#~sp14807483_sc7
Item: 24260610
Model: LUX-4860-L17-50
No reviews yet
Price is $26.49
Unit of measure 50/Pack
Delivery by Tue, Jun 09
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Dark Red, 500/Pack (31511298H)~#|#~m002168474_sc7
Item: 1589630
Model: 31511298H
No reviews yet
Price is $152.99
Unit of measure 500/Box
Free delivery by Thu, Jun 04
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JAM Paper #10 Business Colored Envelopes, 4 1/8" x 9 1/2", Orange Recycled, Bulk 500/Box (15860H)~#|#~sp112110495_sc7JAM Paper #10 Business Colored Envelopes, 4 1/8" x 9 1/2", Orange Recycled, Bulk 500/Box (15860H)~#|#~sp112110494_sc7
Item: 1589645
Model: 15860H
Price is $144.49
Unit of measure 500/Box
Free delivery by Thu, Jun 04
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JAM Paper #10 Policy Envelope, 4 1/8" x 9 1/2", Olive, 100/Pack (125137469D)~#|#~B2A94576-43ED-4865-914A39215629727A_sc7
Item: 24557925
Model: 125137469D
No reviews yet
Price is $48.59
Unit of measure 100/Pack
Free delivery by Thu, Jun 04
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JAM Paper #10 Self Seal Policy Envelopes, 4 1/8" x 9 1/2", White, 50/Pack (7716-WPC-50)~#|#~694E0532-B9FF-4F9A-8AF371917575751B_sc7JAM Paper #10 Self Seal Policy Envelopes, 4 1/8" x 9 1/2", White, 50/Pack (7716-WPC-50)~#|#~4AD46315-C131-4BC0-ADC2542FAEFF64D0_sc7
Item: 24604534
Model: 7716-WPC-50
No reviews yet
Price is $13.95
Unit of measure 50/Pack
Delivery by Thu, Jun 04
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JAM Paper #10 Booklet Envelopes, 4 1/8" x 9 1/2", Dark Green, 100/Pack (21514959d)~#|#~7137717F-3BC5-46E5-814018B67B2006BE_sc7JAM Paper #10 Booklet Envelopes, 4 1/8" x 9 1/2", Dark Green, 100/Pack (21514959d)~#|#~3512B76B-324A-4D15-9DA55BE0B4169266_sc7
Item: 24604649
Model: 21514959d
No reviews yet
Price is $32.99
Unit of measure 100/Pack
Delivery by Thu, Jun 04
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Smoke (LUX-4260-22-50)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Smoke (LUX-4260-22-50)~#|#~sp12275016_sc7
Item: 24162061
Model: LUX-4260-22-50
No reviews yet
Price is $35.39
Unit of measure 50/Pack
Free delivery by Tue, Jun 09
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 1000/BX (7535-1000)~#|#~DB7F205D-9E6A-46E0-8491E1C84AEFDB14_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 1000/BX (7535-1000)~#|#~22EEA5ED-E9AD-40AE-B3AF07777DC2DF1A_sc7
Item: 385671
Model: 7535-1000
No reviews yet
Price is $215.59
Unit of measure 1000/Box
Free delivery by Tue, Jun 09
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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
Price is $55.09
Unit of measure 50/Pack
Free delivery by Tue, Jun 09
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Navy Blue, 500/BX~#|#~m000161287_sc7
Item: 517271
Model: LUX-4860-103500
No reviews yet
Price is $96.39
Free delivery by Tue, Jun 09
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LUX #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) 50/Pack, Limelight (LUX-4860-101-50)~#|#~sp14807404_sc7
Item: 24260863
Model: LUX-4860-101-50
No reviews yet
Price is $19.69
Unit of measure 50/Pack
Delivery by Tue, Jun 09
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Smooth Square Flap Envelopes, Navy Blue, 1000/BX~#|#~m000161287_sc7
Item: 388492
Model: LUX-4860-103-10
No reviews yet
Price is $234.49
Unit of measure 1000/Box
Free delivery by Tue, Jun 09
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JAM Paper Peel & Seal #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 1000/Carton (11789B)~#|#~sp36388124_sc7JAM Paper Peel & Seal #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 1000/Carton (11789B)~#|#~sp36388044_sc7
Item: 260851
Model: 11789B
Price is $261.29
Unit of measure 1000/Carton
Free delivery by Thu, Jun 04
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Blush Pink, 50 Pack (4860-114-50)~#|#~sp226423808_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Blush Pink, 50 Pack (4860-114-50)~#|#~sp226423807_sc7
Item: 24578399
Model: 4860-114-50
No reviews yet
Price is $13.99
Unit of measure 50/Pack
Delivery by Thu, Jun 04
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JAM Paper #10 Business Envelopes, 4 1/8" x 9 1/2", Ultra Fuchsia Pink, 100/Pack (15847d)~#|#~BE03D4BA-C047-4B00-99FC1BBF5E990CA7_sc7JAM Paper #10 Business Envelopes, 4 1/8" x 9 1/2", Ultra Fuchsia Pink, 100/Pack (15847d)~#|#~D119CDB6-5AB4-4271-857FDF38D0025578_sc7
Item: 24604531
Model: 15847d
No reviews yet
Price is $27.99
Unit of measure 100/Pack
Delivery by Thu, Jun 04
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Wisteria Purple, 50/Pack~#|#~m000081288_sc7
Item: 281899
Model: LUX-7716-106-50
No reviews yet
Price is $29.19
Unit of measure 50/Pack
Delivery by Tue, Jun 09
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LUX #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) 50/Pack, Pool (LUX-4860-102-50)~#|#~sp14807463_sc7
Item: 24260625
Model: LUX-4860-102-50
No reviews yet
Price is $25.19
Unit of measure 50/Pack
Delivery by Tue, Jun 09
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Baby Blue, 50/Pack (2155778I)~#|#~sp121511965_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Baby Blue, 50/Pack (2155778I)~#|#~sp121511964_sc7
Item: 1588693
Model: 2155778I
Price is $20.49
Unit of measure 50/Pack
Delivery by Thu, Jun 04
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JAM Paper #10 Policy Business Colored Envelopes, 4.125 x 9.5, Blue Recycled, 50/Pack (15880I)~#|#~m003904550_sc7JAM Paper #10 Policy Business Colored Envelopes, 4.125 x 9.5, Blue Recycled, 50/Pack (15880I)~#|#~m003904549_sc7
Item: 1588700
Model: 15880I
No reviews yet
Price is $26.09
Unit of measure 50/Pack
Delivery by Thu, Jun 04
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LUX #10 Kraft Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, 24lb. Brown Kraft (92031-250)~#|#~sp14807365_sc7
Item: 24260415
Model: 92031-250
No reviews yet
Price is $92.39
Unit of measure 250/Pack
Free delivery by Tue, Jun 09
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JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Gold, 100/Pack (01323305B)~#|#~m000067474_sc7
Item: 260946
Model: 01323305B
No reviews yet
Price is $127.99
Unit of measure 100/Box
Free delivery by Thu, Jun 04
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JAM Paper #10 Policy Business Colored Envelopes, 4 1/8" x 9 1/2", Red Recycled, 25/Pack (25048)~#|#~m002934135_sc7JAM Paper #10 Policy Business Colored Envelopes, 4 1/8" x 9 1/2", Red Recycled, 25/Pack (25048)~#|#~m002934134_sc7
Item: 263863
Model: 25048
No reviews yet
Price is $14.89
Unit of measure 25/Pack
Delivery by Thu, Jun 04
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Teal Blue, 50/Pack (63924024I)~#|#~sp134498426_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Teal Blue, 50/Pack (63924024I)~#|#~sp134498425_sc7
Item: 2633057
Model: 63924024I
No reviews yet
Price is $34.09
Unit of measure 50/Pack
Delivery by Thu, Jun 04
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LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Silver LUX Lining, 50/Pack~#|#~m000081264_sc7
Item: 281875
Model: FLWH4260-03-50
Price is $40.79
Unit of measure 50/Pack
Free delivery by Tue, Jun 09
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Green, 500/Pack (15862H)~#|#~sp111772450_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Green, 500/Pack (15862H)~#|#~sp111772449_sc7
Item: 1589640
Model: 15862H
No reviews yet
Price is $155.59
Unit of measure 500/Box
Free delivery by Thu, Jun 04
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JAM Paper #10 Business Colored Envelopes, 4.125 x 9.5, Violet Purple Recycled, Bulk 500/Box (15864H)~#|#~sp112110499_sc7JAM Paper #10 Business Colored Envelopes, 4.125 x 9.5, Violet Purple Recycled, Bulk 500/Box (15864H)~#|#~sp112110498_sc7
Item: 1589718
Model: 15864H
No reviews yet
Price is $155.59
Unit of measure 500/Box
Free delivery by Thu, Jun 04
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 250/BX (7535-250)~#|#~3D34267C-75F0-457C-80AB5323FB7BACCA_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 250/BX (7535-250)~#|#~10DD16FF-8B98-4CDE-9CF274CB0D678FBC_sc7
Item: 385673
Model: 7535-250
No reviews yet
Price is $149.59
Unit of measure 250/Box
Free delivery by Tue, Jun 09
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JAM Paper #10 Policy Business Envelopes, 4.125 x 9.5, Baby Blue, 50/Pack (3961300I)~#|#~m003904856_sc7JAM Paper #10 Policy Business Envelopes, 4.125 x 9.5, Baby Blue, 50/Pack (3961300I)~#|#~m003904855_sc7
Item: 1588674
Model: 3961300I
No reviews yet
Price is $22.99
Unit of measure 50/Pack
Delivery by Thu, Jun 04
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Quality Park Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA69122)~#|#~sp40322443_sc7Quality Park Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA69122)~#|#~sp40322442_sc7
Item: QUA69122
Model: QUA69122
Price is $88.29
Unit of measure 500/Box
Free Next-Day eligible by Mon, Jun 01
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JAM Paper #10 Booklet Envelope, 4 1/8" x 9 1/2", Ultra Lime Green, 100/Pack (71091d)~#|#~64B4A4E6-B9EF-44E9-8A51B1EF5D123439_sc7JAM Paper #10 Booklet Envelope, 4 1/8" x 9 1/2", Ultra Lime Green, 100/Pack (71091d)~#|#~286F6C91-B3E6-46F8-8E2B0C3FC54EFABB_sc7
JAM Paper #10 Booklet Envelope, 4 1/8" x 9 1/2", Ultra Lime Green, 100/Pack (71091d) is Out of stock
Item: 24604459
Model: 71091d
No reviews yet
Price is $27.99
Unit of measure 100/Pack
LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 1000/BX~#|#~m004940398_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 1000/BX~#|#~m005823989_sc7
LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 1000/BX is Out of stock
Item: 384587
Model: 4860-NPC-1000
No reviews yet
Price is $188.89
Unit of measure 1000/Box
Great Papers! Jolly Holly #10 Envelope, 4 1/8" x 9 1/2", Green, 40/Pack (2011611)~#|#~s0439871_sc7Great Papers! Jolly Holly #10 Envelope, 4 1/8" x 9 1/2", Green, 40/Pack (2011611)~#|#~s0440782_sc7
Great Papers! Jolly Holly #10 Envelope, 4 1/8" x 9 1/2", Green, 40/Pack (2011611) is Out of stock
Item: 401027
Model: 2011611
Price is $9.69
Unit of measure 40/Pack
LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Silver Metallic, 250/BX~#|#~m004940415_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Silver Metallic, 250/BX~#|#~m005823916_sc7
LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Silver Metallic, 250/BX is Out of stock
Item: 384974
Model: 5360-06-250
No reviews yet
Price is $140.09
Unit of measure 250/Box
LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Silver Metallic, 50/Pack~#|#~m004940415_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Silver Metallic, 50/Pack~#|#~m005823916_sc7
LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Silver Metallic, 50/Pack is Out of stock
Item: 281934
Model: 5360-06-50
No reviews yet
Price is $23.59
Unit of measure 50/Pack
LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Copper Metallic~#|#~m004940418_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Copper Metallic~#|#~m005823905_sc7
LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Copper Metallic is Out of stock
Item: 281919
Model: 5360-11-50
No reviews yet
Price is $39.39
Unit of measure 50/Pack
LUX 4 1/8" x 9 1/2" #10 60lbs. Parchment Regular Envelopes, Blue, 50/Pack~#|#~m000081289_sc7
LUX 4 1/8" x 9 1/2" #10 60lbs. Parchment Regular Envelopes, Blue, 50/Pack is Out of stock
Item: 281900
Model: 6660-12-50
Price is $15.09
Unit of measure 50/Pack
JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Laid, 25/Pack (191166)~#|#~m002934323_sc7JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Laid, 25/Pack (191166)~#|#~m002934322_sc7
JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Laid, 25/Pack (191166) is Out of stock
Item: 262487
Model: 191166
Price is $19.99
Unit of measure 25/Pack
JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Gold Yellow, 25/Pack (900906635)~#|#~sp82108684_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Gold Yellow, 25/Pack (900906635)~#|#~sp82108682_sc7
JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Gold Yellow, 25/Pack (900906635) is Out of stock
Item: 261864
Model: 900906635
Price is $19.49
Unit of measure 25/Pack
LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Gold LUX Lining, 50/Pack~#|#~m000081262_sc7
LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Gold LUX Lining, 50/Pack is Out of stock
Item: 281873
Model: FLWH4260-04-50
Price is $23.29
Unit of measure 50/Pack
LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Candy Pink, 250/BX~#|#~m004940458_sc7LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Candy Pink, 250/BX~#|#~m005824001_sc7
LUX #10 Square Flap Envelope, 4-1/8" x 9-1/2", Candy Pink, 250/Box (EX4860-14-250) is Out of stock
Item: 386323
Model: EX4860-14-250
Price is $72.89
Unit of measure 250/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.