Letter Envelopes

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, Apr 08
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Red, 25/Pack (67161)~#|#~sp112110506_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Red, 25/Pack (67161)~#|#~sp112110505_sc7
Item: 260833
Model: 67161
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Seafoam Blue, 250/BX~#|#~m005824022_sc7
Item: 517285
Model: LUX-4860-113250
No reviews yet
Price is $92.49
Free delivery by Wed, Apr 08
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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 Mon, Apr 06
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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 Mon, Apr 06
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 50 Pack (4860-SG-50)~#|#~sp226423802_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 50 Pack (4860-SG-50)~#|#~sp226423801_sc7
Item: 24578396
Model: 4860-SG-50
No reviews yet
Price is $26.19
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) 1000/Box, 24lb. White Linen (WS-2960-1M)~#|#~m004063955_sc7
Item: 2146385
Model: WS-2960-1M
No reviews yet
Price is $160.79
Unit of measure 1000/Pack
Free delivery by Wed, Apr 08
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes W/Peel&Press, White, 250/BX~#|#~m000211244_sc7
Item: 515057
Model: 7716-WPC-250
No reviews yet
Price is $127.99
Free delivery by Wed, Apr 08
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes, Grocery Bag Brown, 50/Pack~#|#~m000081273_sc7
Item: 281884
Model: 7716-GB-50
No reviews yet
Price is $22.19
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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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 Mon, Apr 06
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LUX 60lbs. 4 1/8" x 9 1/2" #10 Bright Regular Envelopes, Bright Green, 250/BX~#|#~m000081292_sc7
Item: 384425
Model: 4260-12-250
No reviews yet
Price is $50.39
Unit of measure 250/Box
Free delivery by Wed, Apr 08
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Mandarin (LUX-4260-11-50)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Mandarin (LUX-4260-11-50)~#|#~sp12275002_sc7
Item: 24162073
Model: LUX-4260-11-50
Price is $22.79
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper #10 Self Seal Policy Envelopes, 4 1/8" x 9 1/2", Strathmore White, 50/Pack (7716-WLI-50)~#|#~6E821E8F-5177-4680-BAA135A9177556E2_sc7JAM Paper #10 Self Seal Policy Envelopes, 4 1/8" x 9 1/2", Strathmore White, 50/Pack (7716-WLI-50)~#|#~E455C262-24B6-42A8-BC866CFE5F843B19_sc7
Item: 24604525
Model: 7716-WLI-50
No reviews yet
Price is $13.95
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes, Teal Blue, 50/Pack~#|#~m000081286_sc7
Item: 281897
Model: LUX-7716-25-50
No reviews yet
Price is $30.49
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper #10 Metallic Business Envelopes, 4.125 x 9.5, Stardream Gold, 25/Pack (SD5360 07)~#|#~m003905201_sc7JAM Paper #10 Metallic Business Envelopes, 4.125 x 9.5, Stardream Gold, 25/Pack (SD5360 07)~#|#~m003905200_sc7
Item: 261972
Model: SD5360 07
No reviews yet
Price is $25.49
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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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, Apr 08
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Grocery Bag Brown, 250/BX~#|#~m004940396_sc7LUX 70lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Grocery Bag Brown, 250/BX~#|#~m005823987_sc7
Item: 384583
Model: 4860-GB-250
No reviews yet
Price is $75.09
Unit of measure 250/Box
Free delivery by Wed, Apr 08
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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 Mon, Apr 06
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JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", Dark Grey, 25/Pack (36396445)~#|#~m004671983_sc7JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", Dark Grey, 25/Pack (36396445)~#|#~m004671982_sc7
Item: 261458
Model: 36396445
Price is $14.89
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Silver, 100/Pack (01323306B)~#|#~m004671920_sc7JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Silver, 100/Pack (01323306B)~#|#~m004671919_sc7
Item: 260947
Model: 01323306B
No reviews yet
Price is $127.99
Unit of measure 100/Box
Free delivery by Mon, Apr 06
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LUX Moistenable Glue #10 Business Envelope, 4 1/2" x 9 1/2", Grocery Bag Brown, 50/Pack (4260-GB-50)~#|#~sp12274947_sc7LUX Moistenable Glue #10 Business Envelope, 4 1/2" x 9 1/2", Grocery Bag Brown, 50/Pack (4260-GB-50)~#|#~sp14081665_sc7
Item: 24216108
Model: 4260-GB-50
No reviews yet
Price is $18.49
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Smoke (EX4860-22-50)~#|#~sp14807360_sc7
Item: 24260421
Model: EX4860-22-50
No reviews yet
Price is $26.79
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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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 Next-Day eligible by tomorrow
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LUX 70lb 4 1/8"x9 1/2" Open End #10 Envelopes, Grocery Bag Brown, 250/BX~#|#~m000081273_sc7
Item: 516427
Model: 7716-GB-250
No reviews yet
Price is $78.29
Free delivery by Wed, Apr 08
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Smoke Gray, 500/BX~#|#~m000161299_sc7
Item: 516408
Model: EX4860-22-500
Price is $139.29
Free delivery by Wed, Apr 08
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JAM Paper #10 Booklet Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Blue, 25/Pack (1327705)~#|#~284E4566-35DF-4D5A-BBB003391DDD875E_sc7
Item: 260899
Model: 1327705
No reviews yet
Price is $46.99
Unit of measure 25/Pack
Free delivery by Mon, Apr 06
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes, Baby Blue, 50/Pack~#|#~m000081266_sc7
Item: 281877
Model: EX7716-13-50
No reviews yet
Price is $30.49
Unit of measure 50/Pack
Delivery by Wed, Apr 08
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Green, 1000/Carton (15862B)~#|#~sp111772450_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Green, 1000/Carton (15862B)~#|#~sp111772449_sc7
Item: 261287
Model: 15862B
No reviews yet
Price is $249.29
Unit of measure 1000/Carton
Free delivery by Mon, Apr 06
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes W/Peel&Press, White Linen, 250/BX~#|#~m000211243_sc7
Item: 515097
Model: 7716-WLI-250
No reviews yet
Price is $109.09
Free delivery by Wed, Apr 08
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LUX 70lb 4 1/8"x9 1/2" Square Flap Linen Envelopes, White, 500/BX~#|#~m000161371_sc7
Item: 513618
Model: 4860-WLI-500
No reviews yet
Price is $110.09
Free delivery by Wed, Apr 08
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JAM Paper #10 Business Strathmore Envelopes, 4.125 x 9.5, Bright White Wove, Bulk 1000/Carton (64933B)~#|#~sp112110502_sc7JAM Paper #10 Business Strathmore Envelopes, 4.125 x 9.5, Bright White Wove, Bulk 1000/Carton (64933B)~#|#~sp112110501_sc7
Item: 262630
Model: 64933B
No reviews yet
Price is $227.69
Unit of measure 1000/Carton
Free delivery by Mon, Apr 06
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LUX 80lbs. 4 1/8" x 9 1/2" Metallic Square Flap Envelopes, Anthracite Metallic Gray, 1000/BX~#|#~m004940420_sc7LUX 80lbs. 4 1/8" x 9 1/2" Metallic Square Flap Envelopes, Anthracite Metallic Gray, 1000/BX~#|#~m005823900_sc7
Item: 385004
Model: 5360-15-1000
No reviews yet
Price is $277.59
Unit of measure 1000/Box
Free delivery by Wed, Apr 08
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes, Navy Blue, 500/BX~#|#~m000081279_sc7
Item: 517160
Model: LUX-7716-103500
No reviews yet
Price is $211.89
Free delivery by Wed, Apr 08
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LUX 80lb 4 1/8"x9 1/2" Square Flap Metallic #10 Envelopes, Bronze, 500/BX~#|#~m004940419_sc7LUX 80lb 4 1/8"x9 1/2" Square Flap Metallic #10 Envelopes, Bronze, 500/BX~#|#~m005823903_sc7
Item: 516491
Model: 5360-12-500
No reviews yet
Price is $158.69
Free delivery by Wed, Apr 08
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JAM Paper Self Seal #10 Policy Envelope 4 1/8" x 9 1/2", Natural, 50/Pack (7716-NPC-50)~#|#~8435FDC7-17D4-4DA7-B11D7C4E304EDAEB_sc7JAM Paper Self Seal #10 Policy Envelope 4 1/8" x 9 1/2", Natural, 50/Pack (7716-NPC-50)~#|#~2F44C80B-A54D-47A7-987771969A9C392B_sc7
Item: 24604491
Model: 7716-NPC-50
No reviews yet
Price is $13.95
Unit of measure 50/Pack
Delivery by Mon, Apr 06
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JAM Paper #10 Policy Metallic Business Envelopes, 4 1/8" x 9 1/2", Stardream Gold, 25/Pack (1261602)~#|#~m003904738_sc7JAM Paper #10 Policy Metallic Business Envelopes, 4 1/8" x 9 1/2", Stardream Gold, 25/Pack (1261602)~#|#~m003904737_sc7
Item: 261973
Model: 1261602
No reviews yet
Price is $23.59
Unit of measure 25/Pack
Delivery by Mon, Apr 06
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes W/Glue, Avocado Green, 250/BX~#|#~m000081265_sc7
Item: 386993
Model: EX7716-27-250
No reviews yet
Price is $120.69
Unit of measure 250/Box
Free delivery by Wed, Apr 08
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JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Red, 100/Pack (01323307B)~#|#~m000067476_sc7
Item: 260948
Model: 01323307B
No reviews yet
Price is $127.99
Unit of measure 100/Box
Free delivery by Mon, Apr 06
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JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 500/Pack (191165H)~#|#~sp132864530_sc7JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 500/Pack (191165H)~#|#~sp132864529_sc7
JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 500/Pack (191165H) is Out of stock
Item: 1589693
Model: 191165H
No reviews yet
Price is $169.19
Unit of measure 500/Box
JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 50/Pack (15847I)~#|#~m003904529_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 50/Pack (15847I)~#|#~m003904528_sc7
JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 50/Pack (15847I) is Out of stock
Item: 1588564
Model: 15847I
Price is $20.49
Unit of measure 50/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.