Letter Envelopes

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 Mon, Apr 06
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JAM Paper Moistenable Glue Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", 50/Pack (92019-50)~#|#~9AD422BF-4262-4F9F-A002BDC822F193C3_sc7
Item: 24560682
Model: 92019-50
No reviews yet
Price is $14.89
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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JAM Paper Moistenable Glue Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", 1000/Pack (92021-1M)~#|#~DD9D5EE7-D078-4997-B11ACD3E9491352C_sc7
Item: 24560680
Model: 92021-1M
No reviews yet
Price is $225.49
Unit of measure 1000/Pack
Free delivery by Mon, Apr 06
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LUX Self Seal #10 Business Envelope, 4 1/2" x 9 1/2", Pastel Gray, 50/Pack (60190-50)~#|#~sp14807401_sc7
Item: 24260549
Model: 60190-50
No reviews yet
Price is $55.49
Unit of measure 50/Pack
Free delivery by Wed, Apr 08
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Limelight Green, 250/BX~#|#~m004940491_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Limelight Green, 250/BX~#|#~m005824012_sc7
Item: 388477
Model: LUX-4860-101-25
No reviews yet
Price is $96.19
Unit of measure 250/Box
Free delivery by Wed, Apr 08
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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
Price is $25.19
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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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 Mon, Apr 06
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 50/Pack (15859I)~#|#~sp111772364_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 50/Pack (15859I)~#|#~sp111772363_sc7
Item: 1588621
Model: 15859I
Price is $17.09
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Blue, 250/Pack (5360-13-250)~#|#~sp228873252_sc7
Item: 24578290
Model: 5360-13-250
No reviews yet
Price is $78.09
Unit of measure 250/Pack
Free delivery by Mon, Apr 06
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JAM Paper Open End #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 50/Pack (6314842I)~#|#~sp74308924_sc7JAM Paper Open End #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 50/Pack (6314842I)~#|#~sp74308921_sc7
Item: 1588608
Model: 6314842I
Price is $24.49
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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JAM Paper #10 Business Envelope 4 1/8" x 9 1/2", White, 250/Pack (43687-250)~#|#~sp228873470_sc7JAM Paper #10 Business Envelope 4 1/8" x 9 1/2", White, 250/Pack (43687-250)~#|#~sp228873469_sc7
Item: 24578329
Model: 43687-250
Price is $31.69
Unit of measure 250/Pack
Delivery by Mon, Apr 06
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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, Apr 08
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Dark Purple, 50/Pack (563912516I)~#|#~sp132864355_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Dark Purple, 50/Pack (563912516I)~#|#~sp132864354_sc7
Item: 1588603
Model: 563912516I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Navy (LUX-4260-103-50)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Navy (LUX-4260-103-50)~#|#~sp12275019_sc7
Item: 24161620
Model: LUX-4260-103-50
No reviews yet
Price is $38.19
Unit of measure 50/Pack
Free delivery by Wed, Apr 08
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 25/Pack (15859)~#|#~sp111772364_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 25/Pack (15859)~#|#~sp111772363_sc7
Item: 260986
Model: 15859
Price is $10.29
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Lime Green, 25/Pack (71091)~#|#~m003904620_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Lime Green, 25/Pack (71091)~#|#~m003904619_sc7
Item: 261157
Model: 71091
Price is $10.29
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Smoke Gray, 250/BX~#|#~m004940462_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Smoke Gray, 250/BX~#|#~m005824005_sc7
Item: 386342
Model: EX4860-22-250
No reviews yet
Price is $55.99
Unit of measure 250/Box
Free delivery by Wed, Apr 08
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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 Mon, Apr 06
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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 Mon, Apr 06
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JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Dark Purple, 50/Pack (563912518I)~#|#~m003905003_sc7JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Dark Purple, 50/Pack (563912518I)~#|#~m003905002_sc7
Item: 1588602
Model: 563912518I
No reviews yet
Price is $26.09
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Black LUX Lining, 50/Pack~#|#~m000081261_sc7
Item: 281872
Model: FLWH4260-02-50
No reviews yet
Price is $26.79
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper #10 Booklet Envelopes, 4 1/8" x 9 1/2", Avocado Green, 50/Pack (4260-102-50)~#|#~FE7F20AF-7B56-40C6-A7AA51B1A138DD11_sc7JAM Paper #10 Booklet Envelopes, 4 1/8" x 9 1/2", Avocado Green, 50/Pack (4260-102-50)~#|#~4B418384-B998-484A-96A10A61CECD25FC_sc7
Item: 24604495
Model: 4260-102-50
No reviews yet
Price is $14.95
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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LUX 4 1/8"x9 1/2" Open End #10 Envelopes, Bright White, 500/BX (7535-500)~#|#~5EC686DA-7AEC-499D-9D9404896C76D77A_sc7LUX 4 1/8"x9 1/2" Open End #10 Envelopes, Bright White, 500/BX (7535-500)~#|#~0C4B9FE1-3B5D-485E-8D78216FC0EADCB0_sc7
Item: 513617
Model: 7535-500
Price is $119.29
Free delivery by Wed, Apr 08
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Pastel Green (65896-50)~#|#~A226610A-D3C5-457D-9410B00C8E1245FD_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Pastel Green (65896-50)~#|#~D5892A2B-5A35-4AA1-9227B5AF59B13B83_sc7
Item: 24260638
Model: 65896-50
No reviews yet
Price is $45.09
Unit of measure 50/Pack
Free delivery by Wed, Apr 08
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Blue, 50/Pack (5360-13-50)~#|#~sp228873505_sc7
Item: 24578435
Model: 5360-13-50
Price is $21.79
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Amethyst Metallic Purple~#|#~m004940421_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Amethyst Metallic Purple~#|#~m005823899_sc7
Item: 281913
Model: 5360-17-50
Price is $20.39
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper #10 Booklet Envelope 4 1/8" x 9 1/2", Pastel Canary Yellow, 50/Pack (65912-50)~#|#~D0302FE4-E265-4424-92F4B2A1090EAEC7_sc7JAM Paper #10 Booklet Envelope 4 1/8" x 9 1/2", Pastel Canary Yellow, 50/Pack (65912-50)~#|#~F147BAE3-1287-42F8-998A8BC707B3499D_sc7
Item: 24604563
Model: 65912-50
No reviews yet
Price is $14.95
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Candy Pink, 1000/BX~#|#~m004940458_sc7LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Candy Pink, 1000/BX~#|#~m005824001_sc7
Item: 386322
Model: EX4860-14-1000
No reviews yet
Price is $169.69
Unit of measure 1000/Box
Free delivery by Wed, Apr 08
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 25/Pack (900926651)~#|#~sp134498373_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 25/Pack (900926651)~#|#~sp134498372_sc7
Item: 261878
Model: 900926651
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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LUX #10 Regular (4 1/8 x 9 1/2) 50/Box, Airmail w/ Security Tint (WS-2956-50)~#|#~m004063949_sc7
Item: 2146693
Model: WS-2956-50
No reviews yet
Price is $18.29
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White, 25/Pack (18506)~#|#~m007063336_sc7JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White, 25/Pack (18506)~#|#~m007063335_sc7
Item: 263980
Model: 18506
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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JAM Paper #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 25/Pack (6314842)~#|#~sp74308924_sc7JAM Paper #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 25/Pack (6314842)~#|#~sp74308921_sc7
Item: 261536
Model: 6314842
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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LUX Square Flap Self Seal #10 Invitation Envelope, 4 1/2" x 9 1/2", Candy Pink, 50/Pack (EX4860-14-50)~#|#~sp14807476_sc7
Item: 24261022
Model: EX4860-14-50
No reviews yet
Price is $25.89
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Gold, 25/Pack (1323305)~#|#~sp137086460_sc7JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Gold, 25/Pack (1323305)~#|#~sp137086019_sc7
Item: 260895
Model: 1323305
No reviews yet
Price is $42.89
Unit of measure 25/Pack
Free delivery by Mon, Apr 06
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Navy Blue, 25/Pack (LEBA367)~#|#~m003905150_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Navy Blue, 25/Pack (LEBA367)~#|#~m003905149_sc7
Item: 261705
Model: LEBA367
Price is $19.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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Mead Kraft Self Seal Security Tinted #10 Business Envelope 4 1/8" x 9 1/2", 45/Box, 12 Boxes/Bundle (MEA75026-12)~#|#~sp151425046_sc7Mead Kraft Self Seal Security Tinted #10 Business Envelope 4 1/8" x 9 1/2", 45/Box, 12 Boxes/Bundle (MEA75026-12)~#|#~sp151425047_sc7
Item: 24516679
Model: MEA75026-12
Price is $40.99
Unit of measure 12/Bundle
Free delivery by Mon, Apr 06
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Mandarin (LUX-4260-11-250)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Mandarin (LUX-4260-11-250)~#|#~sp12275002_sc7
Item: 24162011
Model: LUX-4260-11-250
No reviews yet
Price is $65.89
Unit of measure 250/Pack
Free delivery by Wed, Apr 08
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 1000/Pack (43687-1M)~#|#~sp228873585_sc7JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 1000/Pack (43687-1M)~#|#~sp228873584_sc7
Item: 24578650
Model: 43687-1M
No reviews yet
Price is $82.09
Unit of measure 1000/Pack
Free delivery by Mon, Apr 06
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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 Wed, Apr 08
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Dark Purple, 25/Pack (563912516)~#|#~sp134498341_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Dark Purple, 25/Pack (563912516)~#|#~sp134498340_sc7
Item: 261633
Model: 563912516
Price is $19.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, White - 100% Recycled (4860-WPC-50)~#|#~sp14807406_sc7
Item: 24260847
Model: 4860-WPC-50
Price is $20.19
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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LUX 70lb 4 1/8"x9 1/2" Sqaure Flap #10 Envelopes, Magenta Pink, 500/BX~#|#~m004940454_sc7LUX 70lb 4 1/8"x9 1/2" Sqaure Flap #10 Envelopes, Magenta Pink, 500/BX~#|#~m005823998_sc7
LUX 70lb 4 1/8"x9 1/2" Sqaure Flap #10 Envelopes, Magenta Pink, 500/BX is Out of stock
Item: 516416
Model: EX4860-10-500
Price is $93.09

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.