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Letter Envelopes

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, Jun 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, Jun 02
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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, Jun 05
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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, Jun 05
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Quality Park Flap-Stik V-Flap Security Tinted #10 Business Envelope, 4 1/2" x 9 1/2", White, 500/Box (90030)~#|#~s0462616_sc7
Item: 831281
Model: QUA90030
No reviews yet
Price is $48.69
Unit of measure 500/Box
Free delivery by Wed, Jun 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, Jun 02
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Box, White w/ Simple Seal~#|#~m004063975_sc7
Item: 2147426
Model: 28726-50
No reviews yet
Price is $31.19
Unit of measure 50/Pack
Delivery by Wed, Jun 10
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JAM Paper Self Seal #10 Booklet Envelope 4 1/8" x 9 1/2", White, 50/Pack (75746-50)~#|#~3AFDDC25-BCBE-41D2-B6EC48C84E0E7D06_sc7JAM Paper Self Seal #10 Booklet Envelope 4 1/8" x 9 1/2", White, 50/Pack (75746-50)~#|#~4E8014B3-0A90-4BAA-BFF44CF296C8DF22_sc7
Item: 24604594
Model: 75746-50
No reviews yet
Price is $14.95
Unit of measure 50/Pack
Delivery by Fri, Jun 05
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", White, 500/Box (35532C)~#|#~sp4800450_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", White, 500/Box (35532C)~#|#~sp4800449_sc7
Item: 2633052
Model: 35532C
Price is $52.29
Unit of measure 500/Box
Free delivery by Fri, Jun 05
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Brown, 25/Pack (V01722)~#|#~sp137084310_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Brown, 25/Pack (V01722)~#|#~sp137084266_sc7
Item: 261870
Model: V01722
No reviews yet
Price is $18.69
Unit of measure 25/Pack
Delivery by Fri, Jun 05
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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 $67.09
Free delivery by Wed, Jun 03
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JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", White, 25/Pack (49856)~#|#~sp115352044_sc7JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", White, 25/Pack (49856)~#|#~sp115352043_sc7
Item: 366523
Model: 49856
No reviews yet
Price is $9.59
Unit of measure 25/Pack
Delivery by Fri, Jun 05
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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, Jun 10
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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 Fri, Jun 05
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JAM Paper #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 50/Pack (3984I)~#|#~sp111772303_sc7JAM Paper #10 Kraft Business Envelope, 4 1/8" x 9 1/2", Brown Kraft, 50/Pack (3984I)~#|#~sp111772302_sc7
Item: 24295335
Model: 3984I
Price is $14.39
Unit of measure 50/Pack
Delivery by Fri, Jun 05
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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 $64.99
Unit of measure 500/Box
Free delivery by Wed, Jun 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 $68.49
Unit of measure 250/Pack
Free delivery by Fri, Jun 05
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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 $72.59
Unit of measure 250/Pack
Free delivery by Fri, Jun 05
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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, Jun 02
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Box, 24lb. Natural Linen (WS-2961-50)~#|#~m004063954_sc7
Item: 2146462
Model: WS-2961-50
No reviews yet
Price is $32.29
Unit of measure 50/Pack
Delivery by Wed, Jun 10
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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 $334.99
Unit of measure 2/Carton
Free delivery by Thu, Jun 11
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LUX Square Flap Self Seal #10 Invitation Envelope, 4 1/2" x 9 1/2", Sunflower, 50/Pack (EX4860-12-50)~#|#~sp14807340_sc7
Item: 24261325
Model: EX4860-12-50
No reviews yet
Price is $22.69
Unit of measure 50/Pack
Delivery by Wed, Jun 10
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", White, 1000/Carton (35532B)~#|#~sp4800450_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", White, 1000/Carton (35532B)~#|#~sp4800449_sc7
Item: 2633055
Model: 35532B
Price is $90.19
Unit of measure 1000/Carton
Free delivery by Fri, Jun 05
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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, Jun 10
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JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Wove, 50/Pack (64933I)~#|#~sp112110502_sc7JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Bright White Wove, 50/Pack (64933I)~#|#~sp112110501_sc7
Item: 1588544
Model: 64933I
No reviews yet
Price is $19.69
Unit of measure 50/Pack
Delivery by Fri, Jun 05
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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, Jun 05
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Green, 25/Pack (15862)~#|#~sp111772450_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Green, 25/Pack (15862)~#|#~sp111772449_sc7
Item: 261274
Model: 15862
Price is $10.29
Unit of measure 25/Pack
Delivery by Fri, Jun 05
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Baby Pink, 25/Pack (2155777)~#|#~m002934212_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Baby Pink, 25/Pack (2155777)~#|#~m002934211_sc7
Item: 261385
Model: 2155777
Price is $20.49
Unit of measure 25/Pack
Delivery by Fri, Jun 05
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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, Jun 05
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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, Jun 05
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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, Jun 05
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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
Price is $112.89
Unit of measure 500/Pack
Free delivery by Wed, Jun 10
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Midnight Black, 500/BX~#|#~m004940475_sc7LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Midnight Black, 500/BX~#|#~m005824009_sc7
Item: 514145
Model: F-4560-B-500
No reviews yet
Price is $82.89
Free delivery by Wed, Jun 10
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, White w/ Sec Tint, P&S (75747-50)~#|#~sp14807366_sc7
Item: 24260683
Model: 75747-50
Price is $31.69
Unit of measure 50/Pack
Delivery by Wed, Jun 10
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Azalea Metallic Pink~#|#~m004940424_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Azalea Metallic Pink~#|#~m005823902_sc7
Item: 281916
Model: 5360-24-50
Price is $23.89
Unit of measure 50/Pack
Delivery by Wed, Jun 10
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Quality Park Redi-Strip Self Seal Security Tinted #10 Business Envelope 4 1/8" x 9 1/2", White, 1000/Carton (QUA69122B)
Quality Park Redi-Strip Self Seal Security Tinted #10 Business Envelope 4 1/8" x 9 1/2", White, 1000/Carton (QUA69122B) is New at Staples
Item: QUA69122B
Model: QUA69122B
No reviews yet
Price is $263.50
Unit of measure 1000/Carton
Free delivery by Wed, Jun 03
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 1000/Pack (75746-1M)~#|#~sp228873583_sc7JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 1000/Pack (75746-1M)~#|#~sp228873582_sc7
Item: 24578649
Model: 75746-1M
No reviews yet
Price is $142.89
Unit of measure 1000/Pack
Free delivery by Fri, Jun 05
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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 Fri, Jun 05
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes; Candy Pink, 50/Pack~#|#~m000081270_sc7
LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes; Candy Pink, 50/Pack is Out of stock
Item: 281881
Model: EX7716-14-50
No reviews yet
Price is $23.89
Unit of measure 50/Pack
JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 50/Pack (191165I)~#|#~sp132864373_sc7JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 50/Pack (191165I)~#|#~sp132864372_sc7
JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 50/Pack (191165I) is Out of stock
Item: 1588692
Model: 191165I
Price is $28.29
Unit of measure 50/Pack

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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.