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Letter Envelopes

JAM Paper Peel & Seal #10 Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 50/Pack (11789I)~#|#~sp36388124_sc7JAM Paper Peel & Seal #10 Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 50/Pack (11789I)~#|#~sp36388044_sc7
Item: 1588623
Model: 11789I
Price is $16.99
Unit of measure 50/Pack
Delivery by Fri, Apr 03
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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 Fri, Apr 03
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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 Fri, Apr 03
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Southworth Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", Natural, 250/Box (J404N-10)~#|#~s1175033_sc7Southworth Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", Natural, 250/Box (J404N-10)~#|#~s1174991_sc7
Item: 581511
Model: J404N-10
Price is $74.99
Unit of measure 250/Box
Free delivery by Tue, Mar 31
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Great Papers! #10 Business Envelope, 4 1/8" x 9 1/2", Ivory, 40/Pack (2013204)~#|#~s0953748_sc7
Item: 1605555
Model: 2013204
Price is $8.99
Unit of measure 40/Pack
Delivery by Thu, Apr 09
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JAM Paper Peel & Seal #10 Business Envelope, 4 1/8" x 9 1/2", Christmas Green, 50/Pack (86555I)~#|#~6D72CF40-FFBC-49D2-943889305B5B19A6_sc7
Item: 1588698
Model: 86555I
Price is $17.09
Unit of measure 50/Pack
Delivery by Fri, Apr 03
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Blue, 25/Pack (15861)~#|#~sp111772444_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Blue, 25/Pack (15861)~#|#~sp111772442_sc7
Item: 263914
Model: 15861
Price is $10.29
Unit of measure 25/Pack
Delivery by Fri, Apr 03
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Box, 24lb. White w/ FDIC Security Tint (WS-2652-50)~#|#~m004064021_sc7
Item: 2147235
Model: WS-2652-50
Price is $14.29
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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Quality Park Redi-Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA11118)~#|#~sp40286632_sc7Quality Park Redi-Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA11118)~#|#~sp40286631_sc7
Item: QUA11118
Model: QUA11118
Price is $77.39
Unit of measure Box
Free delivery by Tue, Mar 31
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Quality Park Redi-Strip Security Tinted #10 Treated Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box ~#|#~s1154906_sc7Quality Park Redi-Strip Security Tinted #10 Treated Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box ~#|#~s1172750_sc7
Item: 683586
Model: QUA90019R
Price is $95.99
Unit of measure 500/Box
Free delivery by Tue, Mar 31
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JAM Paper #10 Tyvek Business Envelope, 4 1/8" x 9 1/2", White, 25/Pack (2131077)~#|#~m004542908_sc7JAM Paper #10 Tyvek Business Envelope, 4 1/8" x 9 1/2", White, 25/Pack (2131077)~#|#~m004542907_sc7
Item: 2329379
Model: 2131077
Price is $15.89
Unit of measure 25/Pack
Delivery by Fri, Apr 03
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Neenah Paper #10 Business Envelope, 4 1/8" x 9 1/2", Classic tural White, 500/Box (NEE2803300)~#|#~m002294530_sc7
Item: 2622244
Model: NEE2803300
No reviews yet
Price is $58.89
Unit of measure 500/Box
Free delivery by Wed, Apr 01
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JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Wove, 25/Pack (64933)~#|#~sp112110502_sc7JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Wove, 25/Pack (64933)~#|#~sp112110501_sc7
Item: 262529
Model: 64933
Price is $19.69
Unit of measure 25/Pack
Delivery by Fri, Apr 03
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Neenah Paper CLASSIC CREST #10 Envelope, Gummed Flap, 4 1/8 x 9 1/2, Avon Brilliant White, 500/Box (01843)~#|#~m002272798_sc7
Item: 2657444
Model: NEE6553000
Price is $65.39
Free delivery by Thu, Apr 02
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Quality Park Redi-Seal Security Tinted Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (QUA11218)~#|#~sp145132158_sc7Quality Park Redi-Seal Security Tinted Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (QUA11218)~#|#~sp145132157_sc7
Item: 507690
Model: QUA11218
Price is $101.59
Unit of measure 500/Box
Free delivery by Tue, Mar 31
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 50/Pack (900926651I)~#|#~sp132864269_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 50/Pack (900926651I)~#|#~sp132864268_sc7
Item: 1588594
Model: 900926651I
Price is $20.49
Unit of measure 50/Pack
Delivery by Fri, Apr 03
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Quality Park Redi-Strip Security Tinted #10 Envelopes, 4-1/8" x 9-1/2", White, 30/Box (QUA69112)~#|#~s0375270_sc7Quality Park Redi-Strip Security Tinted #10 Envelopes, 4-1/8" x 9-1/2", White, 30/Box (QUA69112)~#|#~s0171469_sc7
Item: 813435
Model: QUA69112
Price is $24.99
Unit of measure 30/Box
Delivery by Tue, Mar 31
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Orange, 50/Pack (15860I)~#|#~sp112110495_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Orange, 50/Pack (15860I)~#|#~sp112110494_sc7
Item: 1588559
Model: 15860I
Price is $17.09
Unit of measure 50/Pack
Delivery by Fri, Apr 03
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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, Apr 08
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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
Price is $84.79
Unit of measure 1000/Pack
Free delivery by Wed, Apr 08
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Box, 24lb. White Linen (WS-2960-50)~#|#~m004063955_sc7
Item: 2146463
Model: WS-2960-50
Price is $32.29
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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Gartner Studios School Day Icons #10 Document Envelope, 4 1/8" x 9 1/2", White, 20/Pack (52065)~#|#~35292576-3B52-4E69-85B3E320D92BBC25_sc7Gartner Studios School Day Icons #10 Document Envelope, 4 1/8" x 9 1/2", White, 20/Pack (52065)~#|#~ECDE19BA-7C43-499D-97EF5913AC036B30_sc7
Item: 24431599
Model: 52065
No reviews yet
Price is $12.49
Delivery by Wed, Apr 08
30-min pickup
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JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", White, 50/Pack (49856I)~#|#~sp115352044_sc7JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", White, 50/Pack (49856I)~#|#~sp115352043_sc7
Item: 1588599
Model: 49856I
Price is $17.09
Unit of measure 50/Pack
Delivery by Fri, Apr 03
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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 Wed, Apr 08
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 50/Pack (43687-50)~#|#~sp228873472_sc7JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 50/Pack (43687-50)~#|#~sp228873471_sc7
Item: 24578331
Model: 43687-50
No reviews yet
Price is $30.89
Unit of measure 50/Pack
Delivery by Fri, Apr 03
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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 Peel & Seal #10 Business Envelope, 4 1/8" x 9 1/2", Christmas Green, 25/Pack (86555)~#|#~6D72CF40-FFBC-49D2-943889305B5B19A6_sc7
Item: 261275
Model: 86555
Price is $10.29
Unit of measure 25/Pack
Delivery by Fri, Apr 03
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JAM Paper Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 250/Pack (75747-250)~#|#~sp228873478_sc7
Item: 24578346
Model: 75747-250
Price is $66.79
Unit of measure 250/Pack
Free delivery by Fri, Apr 03
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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 $93.79
Unit of measure 250/Box
Free delivery by Wed, Apr 08
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LUX 70lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Baby Blue, 250/BX~#|#~m004940457_sc7LUX 70lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Baby Blue, 250/BX~#|#~m005824016_sc7
Item: 516411
Model: EX4860-13-250
No reviews yet
Price is $56.99
Free delivery by Wed, Apr 08
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LUX Gummed Security Tinted #10 Business Envelope, 4 1/2" x 9 1/2", White, 50/Pack (45146-50)~#|#~sp14807428_sc7
Item: 24261186
Model: 45146-50
Price is $17.09
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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Great Papers #10 Business Envelope 4 1/8" x 9 1/2", Black, 40/Pack (2013208)~#|#~s0953749_sc7
Item: 1605564
Model: 2013208
Price is $15.19
Unit of measure 40/Pack
Delivery by Thu, Apr 09
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Neenah Capitol Bond light cockle 25% cotton #10 24# Bright white Recycled~#|#~s1001269_sc7
Item: 1968193
Model: 5248500
No reviews yet
Price is $306.89
Unit of measure 2/Carton
Free delivery by Thu, Apr 09
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Quality Park #10 Business Envelope, 4-1/8" x 9-1/2", White, 50/Box (QUA69016)~#|#~s0171467_sc7Quality Park #10 Business Envelope, 4-1/8" x 9-1/2", White, 50/Box (QUA69016)~#|#~3856A88D-4B83-428E-B893D04EC624F435_sc7
Item: 813430
Model: QUA69016
Price is $22.69
Unit of measure 50/Box
Delivery by Tue, Mar 31
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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 Fri, Apr 03
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JAM Paper #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 1000/Carton (3984B)~#|#~sp111772303_sc7JAM Paper #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 1000/Carton (3984B)~#|#~sp111772302_sc7
Item: 364375
Model: 3984B
Price is $155.89
Unit of measure 1000/Carton
Free delivery by Fri, Apr 03
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes W/Peel&Press, Natural, 250/BX~#|#~m000211241_sc7
Item: 515118
Model: 7716-NPC-250
No reviews yet
Price is $89.19
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, 250/Pack (75746-250)~#|#~sp228873484_sc7JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 250/Pack (75746-250)~#|#~sp228873483_sc7
Item: 24578367
Model: 75746-250
No reviews yet
Price is $70.79
Unit of measure 250/Pack
Free delivery by Fri, Apr 03
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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 $76.19
Unit of measure 250/Pack
Free delivery by Fri, Apr 03
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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 Fri, Apr 03
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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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LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 250/BX~#|#~m004940398_sc7LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 250/BX~#|#~m005823989_sc7
LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 250/BX is Out of stock
Item: 384601
Model: 4860-NPC-250
No reviews yet
Price is $102.49
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.