Sponsored Products
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 $55.29
Unit of measure 250/Pack
Free delivery by Tue, Jun 24
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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 $19.39
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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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 $139.39
Unit of measure 1000/Pack
Free delivery by Fri, Jun 20
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes; Candy Pink, 50/Pack~#|#~m000081270_sc7
Item: 281881
Model: EX7716-14-50
No reviews yet
Price is $22.69
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 50/Pack (34992I)~#|#~m007159127_sc7JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 50/Pack (34992I)~#|#~m007159126_sc7
Item: 1588542
Model: 34992I
No reviews yet
Price is $19.99
Unit of measure 50/Pack
Delivery by Fri, Jun 20
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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 $24.79
Unit of measure 50/Pack
Delivery by Fri, Jun 20
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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 $44.59
Unit of measure 50/Pack
Free delivery by Tue, Jun 24
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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 $117.29
Unit of measure 500/Box
Free Next-Day eligible by Mon, Jun 16
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LUX #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) 50/Pack, Navy (LUX-4860-103-50)~#|#~sp14807379_sc7
Item: 24260395
Model: LUX-4860-103-50
Price is $22.09
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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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
Item: 1588564
Model: 15847I
Price is $19.99
Unit of measure 50/Pack
Delivery by Fri, Jun 20
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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
Item: 516416
Model: EX4860-10-500
Price is $134.59
Free delivery by Tue, Jun 24
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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 $19.19
Unit of measure 25/Pack
Delivery by Fri, Jun 20
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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 Fri, Jun 20
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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
Item: 384587
Model: 4860-NPC-1000
No reviews yet
Price is $179.79
Unit of measure 1000/Box
Free delivery by Tue, Jun 24
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Great Papers Jolly Holly #10 Envelope (2011611)~#|#~s0439871_sc7Great Papers Jolly Holly #10 Envelope (2011611)~#|#~s0440782_sc7
Item: 401027
Model: 2011611
Price is $8.29
Unit of measure 40/Pack
Delivery by Wed, Jun 25
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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 $62.69
Unit of measure 250/Pack
Free delivery by Tue, Jun 24
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Seafoam Blue, 500/BX~#|#~m005824022_sc7
Item: 517493
Model: LUX-4860-113500
No reviews yet
Price is $120.19
Free delivery by Tue, Jun 24
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (67161I)~#|#~sp112110506_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Red, 50/Pack (67161I)~#|#~sp112110505_sc7
Item: 1588624
Model: 67161I
Price is $16.59
Unit of measure 50/Pack
Delivery by Fri, Jun 20
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JAM Paper #10 Policy Business Envelopes, 4 1/8" x 9 1/2", Presidential Blue, 25/Pack (263912999)~#|#~sp137085032_sc7
Item: 261135
Model: 263912999
Price is $14.49
Unit of measure 25/Pack
Delivery by Fri, Jun 20
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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 $19.99
Unit of measure 25/Pack
Delivery by Fri, Jun 20
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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 $19.99
Unit of measure 50/Pack
Delivery by Fri, Jun 20
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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 Fri, Jun 20
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JAM Paper Peel & Seal #10 Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 500/Pack (11789H)~#|#~sp36388124_sc7JAM Paper Peel & Seal #10 Business Envelope, 4 1/8" x 9 1/2", Christmas Red, 500/Pack (11789H)~#|#~sp36388044_sc7
Item: 1589659
Model: 11789H
No reviews yet
Price is $151.79
Unit of measure 500/Box
Free delivery by Fri, Jun 20
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, Citrus (LUX-4860-L20-50)~#|#~sp14807405_sc7
Item: 24260540
Model: LUX-4860-L20-50
No reviews yet
Price is $29.09
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Limelight (LUX-4260-101-50)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 50/Pack, Limelight (LUX-4260-101-50)~#|#~sp12275029_sc7
Item: 24162015
Model: LUX-4260-101-50
No reviews yet
Price is $21.49
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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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
Item: 384601
Model: 4860-NPC-250
No reviews yet
Price is $99.99
Unit of measure 250/Box
Free delivery by Tue, Jun 24
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Anthracite Metallic Gray, 50/Pack~#|#~m004940420_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Anthracite Metallic Gray, 50/Pack~#|#~m005823900_sc7
Item: 281914
Model: 5360-15-50
No reviews yet
Price is $27.95
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, 70lb. Bright White (4860-70W-50)~#|#~sp14807393_sc7
Item: 24260394
Model: 4860-70W-50
No reviews yet
Price is $17.09
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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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 $74.29
Unit of measure 250/Pack
Free delivery by Fri, Jun 20
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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 $44.09
Unit of measure 50/Pack
Free delivery by Tue, Jun 24
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JAM Paper #10 Booklet Envelope, 4 1/8" x 9 1/2", Blue, 100/Pack (15861d)~#|#~05DEE4CF-C543-4869-8645BDAA8DAA7AAE_sc7JAM Paper #10 Booklet Envelope, 4 1/8" x 9 1/2", Blue, 100/Pack (15861d)~#|#~193F6945-35C5-4CB0-AB9DDE35D5470183_sc7
Item: 24604579
Model: 15861d
No reviews yet
Price is $27.99
Unit of measure 100/Pack
Delivery by Fri, Jun 20
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LUX Moistenable Glue #10 Window Envelope, 4 1/2" x 9 1/2", Electric Yellow, 50/Pack (4261-20-50)~#|#~m000081284_sc7
Item: 281895
Model: EX7716-12-50
Price is $71.19
Unit of measure 50/Pack
Free delivery by Tue, Jun 24
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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 $34.49
Unit of measure 50/Pack
Delivery by Tue, Jun 24
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LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Gold LUX Lining, 50/Pack~#|#~m000081262_sc7
Item: 281873
Model: FLWH4260-04-50
Price is $36.29
Unit of measure 50/Pack
Free delivery by Tue, Jun 24
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Bazic Kraft Self Seal Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", 500/Pack (BAZ5064)~#|#~sp151423994_sc7
Bazic Kraft Self Seal Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", 500/Pack (BAZ5064) is Out of stock
Item: 24516828
Model: BAZ5064
No reviews yet
Price is $40.89
Unit of measure 500/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.