JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Aqua Blue, 25/Pack (1523976)~#|#~m002934481_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Aqua Blue, 25/Pack (1523976)~#|#~m003904752_sc7
Item: 364291
Model: 1523976
No reviews yet
Price is $20.49
Unit of measure 25/Pack
Delivery by Tue, Apr 07
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JAM Paper #10 Policy Envelope, 4 1/8" x 9 1/2", Olive, 50/Pack (125137469I)~#|#~0317A995-6346-4603-94E01FB41B4EF7F4_sc7
Item: 24557948
Model: 125137469I
No reviews yet
Price is $26.09
Unit of measure 50/Pack
Delivery by Tue, Apr 07
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JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Natural White, 25/Pack (191170)~#|#~03BFE419-087E-41F7-B4F6D36899F185ED_sc7JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Natural White, 25/Pack (191170)~#|#~02A23036-615A-4340-92838DA52A76DAD3_sc7
Item: 262515
Model: 191170
Price is $20.49
Unit of measure 25/Pack
Delivery by Tue, Apr 07
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes, Wisteria Purple, 500/BX~#|#~m000081288_sc7
Item: 517171
Model: LUX-7716-106500
No reviews yet
Price is $201.99
Free delivery by Thu, Apr 09
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Great Papers! Peppermint and Candy Cane Party Holiday #10 Invitation Envelope, 9.5" x 4.125", 40/Pack (2025041)~#|#~03CA3256-FDC2-4268-A2E964281E557A0B_sc7Great Papers! Peppermint and Candy Cane Party Holiday #10 Invitation Envelope, 9.5" x 4.125", 40/Pack (2025041)~#|#~41AA744D-D89D-4FB5-A50C17E7727BB532_sc7
Item: 24662407
Model: 2025041
No reviews yet
Price is $12.99
Delivery by Fri, Apr 10
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Green, 500/Pack (15862H)~#|#~sp111772450_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Green, 500/Pack (15862H)~#|#~sp111772449_sc7
Item: 1589640
Model: 15862H
No reviews yet
Price is $155.59
Unit of measure 500/Box
Free delivery by Tue, Apr 07
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LUX 4 1/8" x 9 1/2" #10 60lbs. Bright Regular Envelopes, Green, 50/Pack~#|#~m000081292_sc7
Item: 281903
Model: 4260-12-50
Price is $44.29
Unit of measure 50/Pack
Free delivery by Thu, Apr 09
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Silver Metallic, 50/Pack~#|#~m004940415_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Silver Metallic, 50/Pack~#|#~m005823916_sc7
Item: 281934
Model: 5360-06-50
No reviews yet
Price is $23.59
Unit of measure 50/Pack
Delivery by Thu, Apr 09
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Smooth Square Flap Envelopes, Navy Blue, 1000/BX~#|#~m000161287_sc7
Item: 388492
Model: LUX-4860-103-10
No reviews yet
Price is $234.49
Unit of measure 1000/Box
Free delivery by Thu, Apr 09
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JAM Paper #10 Policy Envelopes, 4 1/8 x 9 1/2, Christmas Red Recycled, 50/pack (31515415i)~#|#~sp6909568_sc7
Item: 24052266
Model: 31515415I
No reviews yet
Price is $30.49
Unit of measure 50/Pack
Delivery by Tue, Apr 07
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Blush Pink, 50 Pack (4860-114-50)~#|#~sp226423808_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Blush Pink, 50 Pack (4860-114-50)~#|#~sp226423807_sc7
Item: 24578399
Model: 4860-114-50
No reviews yet
Price is $13.99
Unit of measure 50/Pack
Delivery by Tue, Apr 07
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Silver Metallic, 250/BX~#|#~m004940415_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Silver Metallic, 250/BX~#|#~m005823916_sc7
Item: 384974
Model: 5360-06-250
No reviews yet
Price is $140.09
Unit of measure 250/Box
Free delivery by Thu, Apr 09
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Dark Red, 50/Pack (31511298I)~#|#~sp137085037_sc7
Item: 1588662
Model: 31511298I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Tue, Apr 07
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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 $155.59
Unit of measure 500/Box
Free delivery by Tue, Apr 07
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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 $29.89
Unit of measure 50/Pack
Delivery by Thu, Apr 09
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Southworth Linen Business Envelope, #10, 24 lb., Ivory, 50/Pack (P564-10)~#|#~s1174972_sc7Southworth Linen Business Envelope, #10, 24 lb., Ivory, 50/Pack (P564-10)~#|#~s1174973_sc7
Item: 418665
Model: P564-10
Price is $31.99
Unit of measure 50/Pack
Delivery by Thu, Apr 09
30-min pickup
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Southworth Linen Business Envelope, #10, 24 lb., White, 50/Pack (P554-10)~#|#~s1175005_sc7Southworth Linen Business Envelope, #10, 24 lb., White, 50/Pack (P554-10)~#|#~s1174975_sc7
Item: 420562
Model: P554-10
Price is $31.99
Unit of measure 50/Pack
Delivery by Thu, Apr 09
30-min pickup
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Black, 50/Pack (900921796I)~#|#~sp121511957_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Black, 50/Pack (900921796I)~#|#~sp121511956_sc7
Item: 1588605
Model: 900921796I
No reviews yet
Price is $23.99
Unit of measure 50/Pack
Delivery by Tue, Apr 07
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Teal Blue, 250/BX~#|#~m000081286_sc7
Item: 387956
Model: LUX-7716-25-250
No reviews yet
Price is $114.89
Unit of measure 250/Box
Free delivery by Thu, Apr 09
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LUX 4 1/8" x 9 1/2" #10 70lbs. Open End Envelopes, Garnet Red, 50/Pack~#|#~m000081272_sc7
Item: 281883
Model: EX7716-26-50
No reviews yet
Price is $55.29
Unit of measure 50/Pack
Free delivery by Thu, Apr 09
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Staples Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", White, 25/Pack~#|#~F209E3C3-756E-480B-B058972E77C2A6BB_sc7Staples Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", White, 25/Pack~#|#~2B727EE8-EAB5-4F6C-A36AC5567FDB81C3_sc7
Staples Security Tinted #10 Business Envelope, 4 1/8" x 9 1/2", White, 25/Pack is In-store only
Item: 862998
Model: 50296/74046
Price is $3.79
Unit of measure 25/Pack
30-min pickup
Gartner Studios #10 Envelope, 4.12" x 9.5", Marble/Gold Foil, 20/Pack (27513)~#|#~sp69181495_sc7Gartner Studios #10 Envelope, 4.12" x 9.5", Marble/Gold Foil, 20/Pack (27513)~#|#~sp69181494_sc7
Gartner Studios #10 Envelope, 4.12" x 9.5", Marble/Gold Foil, 20/Pack (27513) is In-store only
Item: 2721266
Model: 27513JAH
Price is $12.49
30-min pickup
Gartner Studios Gummed #10 Envelope, 4.12" x 9.5", Gray Linen, 20/Pack (27514)~#|#~sp69181493_sc7Gartner Studios Gummed #10 Envelope, 4.12" x 9.5", Gray Linen, 20/Pack (27514)~#|#~sp69181492_sc7
Gartner Studios Gummed #10 Envelope, 4.12" x 9.5", Gray Linen, 20/Pack (27514) is In-store only
Item: 2721265
Model: 27514JAH
Price is $12.49
30-min pickup
JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Yellow, 25/Pack (PACV356)~#|#~m002169008_sc7
JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Yellow, 25/Pack (PACV356) is Out of stock
Item: 262275
Model: PACV356
No reviews yet
Price is $25.49
Unit of measure 25/Pack
LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Midnight Black (LUX-4260-B-250)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Midnight Black (LUX-4260-B-250)~#|#~sp12275009_sc7
LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, Midnight Black (LUX-4260-B-250) is Out of stock
Item: 24161979
Model: LUX-4260-B-250
No reviews yet
Price is $59.69
Unit of measure 250/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
Quality Park Gummed Brightly Colored Business #10 Envelopes, 4 1/8" x 9 1/2", Green, 25/Pk~#|#~s0171215_sc7
Quality Park Gummed Brightly Colored Business #10 Envelopes, 4 1/8" x 9 1/2", Green, 25/Pk is Out of stock
Item: 507683
Model: QUA11135
No reviews yet
Unit of measure 25/Pack
JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Yellow, Bulk 500/Box (PACV356H)~#|#~m002169008_sc7
JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Yellow, Bulk 500/Box (PACV356H) is Out of stock
Item: 1589612
Model: PACV356H
No reviews yet
Price is $377.99
Unit of measure 500/Box
JAM Paper #10 Policy Business Envelopes, 4.125 x 9.5, Black Linen, Bulk 1000/Carton (V01218B)~#|#~m003905223_sc7JAM Paper #10 Policy Business Envelopes, 4.125 x 9.5, Black Linen, Bulk 1000/Carton (V01218B)~#|#~m003905222_sc7
JAM Paper #10 Policy Business Envelopes, 4.125 x 9.5, Black Linen, Bulk 1000/Carton (V01218B) is Out of stock
Item: 261616
Model: V01218B
No reviews yet
Price is $362.99
Unit of measure 1000/Carton
LUX Self Seal #10 Business Envelope 4 1/8" x 9 1/2", Magenta, 50/Pack (EX4860-10-50)~#|#~sp14807459_sc7
LUX Self Seal #10 Business Envelope 4 1/8" x 9 1/2", Magenta, 50/Pack (EX4860-10-50) is Out of stock
Item: 24260628
Model: EX4860-10-50
No reviews yet
Price is $19.99
Unit of measure 50/Pack
Neenah Paper CLASSIC CREST #10 Envelope, Gummed Flap, 4 1/8 x 9 1/2, Avon Brilliant White, 500/Box (01843)
Neenah Paper CLASSIC CREST #10 Envelope, Gummed Flap, 4 1/8 x 9 1/2, Avon Brilliant White, 500/Box (01843) is Out of stock
Item: NEE6553000
Model: NEE6553000
No reviews yet
Price is $45.47
LUX 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Crystal Clear, 1000/BX~#|#~m000161313_sc7
LUX 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Crystal Clear, 1000/BX is Out of stock
Item: 385993
Model: CC10-1000
No reviews yet
Price is $228.19
Unit of measure 1000/Box
JAM Paper #10 Business Foil Envelopes with Self Adhesive Closure, 4.125 x 9.5, Green, 25/pack (1323308)~#|#~m000067479_sc7
JAM Paper #10 Business Foil Envelopes with Self Adhesive Closure, 4.125 x 9.5, Green, 25/pack (1323308) is Out of stock
Item: 260901
Model: 1323308
No reviews yet
Price is $41.89
Unit of measure 25/Pack
JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 25/Pack (34992)~#|#~m007159127_sc7JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 25/Pack (34992)~#|#~m007159126_sc7
JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 25/Pack (34992) is Out of stock
Item: 262547
Model: 34992
No reviews yet
Price is $20.49
Unit of measure 25/Pack
Southworth Document Envelope 4 1/8" x 9 1/2", Ivory, 50/Pack (P984-10L/3/18)~#|#~s1174951_sc7Southworth Document Envelope 4 1/8" x 9 1/2", Ivory, 50/Pack (P984-10L/3/18)~#|#~s1174955_sc7
Southworth Document Envelope 4 1/8" x 9 1/2", Ivory, 50/Pack (P984-10L/3/18) is Out of stock
Item: 619287
Model: P984-10L/3/18
Price is $8.19
Unit of measure 50/Pack
Staples EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Assorted Pastels, 50/Pack (23425)~#|#~F617DB9B-D86F-4FB4-899F0A89BF9431E4_sc7Staples EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Assorted Pastels, 50/Pack (23425)~#|#~E297209E-D18F-48EC-A2F309CDC7163A52_sc7
Staples EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Assorted Pastels, 50/Pack (23425) is Out of stock
Item: 122726
Model: ST23425-CC
Price is $11.79
Unit of measure 50/Pack
Staples Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White, 125/Box (235234N)~#|#~9BB26C75-8A31-4376-A9F1BF42A7BCDC94_sc7Staples Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White, 125/Box (235234N)~#|#~881ABB6D-1E1E-43AB-A58109CCDF026BB4_sc7
Staples Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White, 125/Box (235234N) is Out of stock
Item: 235234
Model: ST235234N-CC
Price is $15.59
Unit of measure 125/Box
Staples Gummed Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 125/Box (276204N)~#|#~sp41694144_sc7Staples Gummed Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 125/Box (276204N)~#|#~sp41694143_sc7
Staples Gummed Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 125/Box (276204N) is Out of stock
Item: 276204
Model: 19261
Price is $4.89
Unit of measure 125/Box
Staples QuickStrip EasyClose Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (19956)~#|#~sp42170740_sc7
Staples QuickStrip EasyClose Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (19956) is Out of stock
Item: 871070
Model: 19956
Price is $5.59
Unit of measure 100/Box
JAM Paper #10 Invitation Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 1000/Carton (15847B)~#|#~m003904529_sc7JAM Paper #10 Invitation Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 1000/Carton (15847B)~#|#~m003904528_sc7
JAM Paper #10 Invitation Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 1000/Carton (15847B) is Out of stock
Item: 261197
Model: 15847B
No reviews yet
Price is $242.69
Unit of measure 1000/Carton

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.