Letter Envelopes

LUX 60lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, White W/Red LUX, 500/BX~#|#~m000081263_sc7
Item: 516402
Model: FLWH4260-01-500
Price is $121.89
Free delivery by Wed, Jul 22
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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 $95.99
Free delivery by Wed, Jul 22
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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, Jul 22
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LUX Self Seal #10 Business Envelope 4 1/8" x 9 1/2", Magenta, 50/Pack (EX4860-10-50)~#|#~sp14807459_sc7
Item: 24260628
Model: EX4860-10-50
No reviews yet
Price is $19.99
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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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 Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Navy Blue, 50/Pack~#|#~m000081279_sc7
Item: 281890
Model: LUX-7716-103-50
No reviews yet
Price is $29.19
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX 13lbs. 4 1/8" x 9 1/2" #10 Regular Envelopes, Airmail, 250/BX~#|#~m000161316_sc7
Item: 385972
Model: 92908-250
No reviews yet
Price is $105.39
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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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, Jul 22
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 1000/Pack (43687-1M)~#|#~sp228873585_sc7JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 1000/Pack (43687-1M)~#|#~sp228873584_sc7
Item: 24578650
Model: 43687-1M
No reviews yet
Price is $82.09
Unit of measure 1000/Pack
Free delivery by Wed, Jul 22
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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 Wed, Jul 22
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LUX #10 Kraft Regular Envelopes (4 1/8 x 9 1/2) 250/Pack, 24lb. Brown Kraft (92031-250)~#|#~sp14807365_sc7
Item: 24260415
Model: 92031-250
No reviews yet
Price is $92.39
Unit of measure 250/Pack
Free delivery by Wed, Jul 22
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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 Wed, Jul 22
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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, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Pool Blue, 50/Pack~#|#~m000081280_sc7
Item: 281891
Model: LUX-7716-102-50
Price is $55.09
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Orange, 25/Pack (15860)~#|#~sp112110495_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Orange, 25/Pack (15860)~#|#~sp112110494_sc7
Item: 261229
Model: 15860
Price is $10.29
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Red LUX Lining, 50/Pack~#|#~m000081263_sc7
Item: 281874
Model: FLWH4260-01-50
Price is $24.59
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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JAM Paper #10 Policy Envelope, 4 1/8" x 9 1/2", Olive, 100/Pack (125137469D)~#|#~B2A94576-43ED-4865-914A39215629727A_sc7
Item: 24557925
Model: 125137469D
No reviews yet
Price is $48.59
Unit of measure 100/Pack
Free delivery by Wed, Jul 22
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LUX #10 Square Flap Envelopes (4 1/8 x 9 1/2) 50/Pack, White - 100% Recycled (4860-WPC-50)~#|#~sp14807406_sc7
Item: 24260847
Model: 4860-WPC-50
Price is $20.19
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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JAM Paper #10 Policy Business Strathmore Envelopes, 4.125 x 9.5, Natural White Wove, 50/Pack (191249I)~#|#~m007063366_sc7JAM Paper #10 Policy Business Strathmore Envelopes, 4.125 x 9.5, Natural White Wove, 50/Pack (191249I)~#|#~m007063365_sc7
Item: 1588541
Model: 191249I
No reviews yet
Price is $26.09
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX Self Seal #10 Business Envelope, 4 1/2" x 9 1/2", Pastel Gray, 50/Pack (60190-50)~#|#~sp14807401_sc7
Item: 24260549
Model: 60190-50
No reviews yet
Price is $55.49
Unit of measure 50/Pack
Free delivery by Wed, Jul 22
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JAM Paper Moistenable Glue Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", 250/Pack (92021-250)~#|#~5592B14A-6CE5-44F4-800F2D1421AD3A2C_sc7
Item: 24560681
Model: 92021-250
No reviews yet
Price is $78.99
Unit of measure 250/Pack
Free delivery by Wed, Jul 22
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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 Wed, Jul 22
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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 Wed, Jul 22
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JAM Paper #10 Tyvek Business Envelope, 4 1/8" x 9 1/2", White, 50/Pack (2131077C)~#|#~m004542908_sc7JAM Paper #10 Tyvek Business Envelope, 4 1/8" x 9 1/2", White, 50/Pack (2131077C)~#|#~m004542907_sc7
Item: 2329434
Model: 2131077C
No reviews yet
Price is $29.49
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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JAM Paper #10 Tyvek Business Envelope, 4 1/8" x 9 1/2", White, 250/Box (2131077I)~#|#~m004542908_sc7JAM Paper #10 Tyvek Business Envelope, 4 1/8" x 9 1/2", White, 250/Box (2131077I)~#|#~m004542907_sc7
Item: 2329380
Model: 2131077I
No reviews yet
Price is $144.49
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Blue, 500/Pack (5360-13-500)~#|#~sp228873255_sc7
Item: 24578294
Model: 5360-13-500
No reviews yet
Price is $145.09
Unit of measure 500/Pack
Free delivery by Wed, Jul 22
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Lime Green, 25/Pack (71091)~#|#~m003904620_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Lime Green, 25/Pack (71091)~#|#~m003904619_sc7
Item: 261157
Model: 71091
Price is $10.29
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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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 Wed, Jul 22
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes W/Glue, Gold Metallic, 250/BX~#|#~m004940416_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes W/Glue, Gold Metallic, 250/BX~#|#~m005823910_sc7
Item: 384977
Model: 5360-07-250
Price is $79.79
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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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 Wed, Jul 22
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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 Wed, Jul 22
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JAM Paper #10 Business Envelope 4 1/8" x 9 1/2", Dark Green, 25/Pack (21514959)~#|#~A39DBCEE-6D8E-406C-BAB9041C11DCCE40_sc7JAM Paper #10 Business Envelope 4 1/8" x 9 1/2", Dark Green, 25/Pack (21514959)~#|#~5A98AEEA-DBF2-495F-8F0DBF4444796919_sc7
Item: 2633063
Model: 21514959
Price is $18.89
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 25/Pack (191165)~#|#~sp134498412_sc7JAM Paper Strathmore #10 Business Envelope, 4 1/8" x 9 1/2", Ivory Wove, 25/Pack (191165)~#|#~sp134498266_sc7
Item: 262564
Model: 191165
Price is $20.49
Unit of measure 25/Pack
Delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes W/Glue Closure, Vista Metallic Blue~#|#~m000081324_sc7
Item: 281935
Model: 5360-29-50
No reviews yet
Price is $28.99
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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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, Jul 22
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LUX 70lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Bright White, 500/BX~#|#~m000211252_sc7
Item: 513630
Model: 4860-70W-500
Price is $110.29
Free delivery by Wed, Jul 22
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Navy Blue, 250/BX~#|#~m000081279_sc7
Item: 388693
Model: LUX-7716-103-25
No reviews yet
Price is $114.89
Unit of measure 250/Box
Free delivery by Wed, Jul 22
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Seafoam Blue, 50/Pack~#|#~m000081282_sc7
Item: 281893
Model: LUX-7716-113-50
Price is $30.49
Unit of measure 50/Pack
Delivery by Wed, Jul 22
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LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 1000/Pack, Navy (LUX42601031000)~#|#~sp12274947_sc7LUX #10 Regular Envelopes (4 1/8 x 9 1/2) 1000/Pack, Navy (LUX42601031000)~#|#~sp12275019_sc7
Item: 24161971
Model: LUX42601031000
Price is $166.09
Unit of measure 1000/Pack
Free delivery by Wed, Jul 22
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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)~#|#~sp108671159_sc7
Quality Park Redi-Strip Self Seal Security Tinted #10 Business Envelope 4 1/8" x 9 1/2", White, 1000/Carton (QUA69122B) is Out of stock
Item: 2623287
Model: QUA69122B
No reviews yet
Price is $165.49
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.