Sponsored Products
LUX A7 Foil Lined Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Black w/Red LUX Lining (FLBK4880-01-50)~#|#~m000082008_sc7
Item # : 282737
Model # : FLBK4880-01-50
No reviews yet
LUX® Size A7 envelope with peel and press in black with red lux lining color measuring 5 1/4" x 7 1/4" has basis weight of 80 lbs has a vellum finish and is sold as 50 per pack.
  • A7 Foil Lined Invitation Envelopes (5 1/4 x 7 1/4) are perfect for party invites/thank you cards/wedding invites/announcements/5x7 photos
  • Comes in Black w/Red LUX Lining, 80lb. Text Paper
Price is $20.99
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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Price is $22.09
Unit of measure 25/Pack
Delivery by Fri, Jun 27
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Staples Gummed Kraft Catalog Envelopes, 7.5"L x 10.5"H, Brown, 100/Box (534719/17095)~#|#~s1225277_sc7
Staples Gummed Kraft Catalog Envelopes, 7.5"L x 10.5"H, Brown, 100/Box (534719/17095)~#|#~s1225276_sc7
Item # : 534719
Model # : ST534719-CC
Send mail, invoices or small items with this 100-count box of Staples gummed flap 7.5 x 10.5-inch brown kraft envelopes.
  • Catalog envelopes are perfect for books, brochures, and documents
  • Made from brown kraft paper that conceals contents from prying eyes
Price is $30.89
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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Tyvek Self Seal Catalog Envelopes, 9" x 12", White, 100/Carton (TYE09122WE)~#|#~s0537570_sc7
Item # : 947684
Model # : TYE09122WE
Ship a variety of bulky items and reports with this case of 100 white Tyvek expanding QuickStrip catalog envelopes.
  • Catalog envelope is perfect for bulky printed materials
  • Comes in white and made of Tyvek
Price is $230.79
Unit of measure 100/Carton
Free delivery by Tue, Jul 01
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Quality Park Self Seal Kraft Catalog Envelopes, 9"L x 12"H, Kraft, 25/Box (QUA93334)~#|#~sp44343614_sc7
Quality Park Self Seal Kraft Catalog Envelopes, 9"L x 12"H, Kraft, 25/Box (QUA93334)~#|#~sp44343613_sc7
Item # : 445595
Model # : QUA93334
Keep mail and other important documents secure with these Quality Park self-seal catalog envelopes.
  • Expansion envelopes offer security for bulky mailings
  • Made from extra heavyweight 40 lbs. brown kraft stock to maintain durability during transit
Price is $52.59
Unit of measure 25/Box
Free delivery by Thu, Jun 26
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JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", White, 50/Pack (49856I)~#|#~sp115352044_sc7
JAM Paper Open End #10 Currency Envelope, 4 1/8" x 9 1/2", White, 50/Pack (49856I)~#|#~sp115352043_sc7
Item # : 1588599
Model # : 49856I
The JAM Paper #10 (4.13" x 9.5") policy envelope is a rather stylish option meant for carrying out official communication.
  • Product Type: Policy Envelope
  • White paper envelope
Price is $16.69
Unit of measure 50/Pack
Delivery by Fri, Jun 27
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JAM Paper Tyvek Open End Clasp Catalog Envelope, 11 1/2" x 14 1/2", Red, 10/Pack (V021388B)~#|#~sp61031269_sc7
JAM Paper Tyvek Open End Clasp Catalog Envelope, 11 1/2" x 14 1/2", Red, 10/Pack (V021388B)~#|#~sp61031267_sc7
Item # : 1912861
Model # : V021388B
JAM Paper® Tyvek Envelopes provide exceptionally durable protection for your mailed items!
  • Red Tyvek Open End Envelopes
  • Size: 11.5 x 14.5 inches
Price is $22.09
Unit of measure 10/Pack
Delivery by Fri, Jun 27
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Quality Park Unsealed Booklet Envelope, 9 1/2" x 11 7/8", Beige, 100/Box (QUA89604)~#|#~s0055705_sc7
Quality Park Unsealed Booklet Envelope, 9 1/2" x 11 7/8", Beige, 100/Box (QUA89604)~#|#~s0066917_sc7
Item # : 508477
Model # : QUA89604
Ideal for transport and storage of paper, drawings and proofs.
  • Material: 3 point tag
  • Size: 9 1/2"H x 11 3/4"W
Price is $135.29
Unit of measure 100/Box
Free delivery by Wed, Jun 25
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JAM Paper® Plastic Envelopes with Button and String Tie Closure, Letter Open End, 9.75 x 11.75, Bright Orange, 12/Pack (1221560)~#|#~m005745016_sc7
JAM Paper® Plastic Envelopes with Button and String Tie Closure, Letter Open End, 9.75 x 11.75, Bright Orange, 12/Pack (1221560)~#|#~m005745015_sc7
Item # : 263046
Model # : 1221560
No reviews yet
JAM Paper® 9 3/4" x 11 3/4" Orange letter open end plastic button and string envelope in a pack of 12 allow keeping documents safely and are expandable up to 1".
  • Size: 9 3/4" x 11 3/4"
  • Closure: Button & string
Price is $31.59
Unit of measure 12/Pack Price per unit $2.63/Envelope
Delivery by Fri, Jun 27
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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
  • Color: Olive
  • Size: #10 Policy (4.125 x 9.5 inches)
Price is $25.39
Unit of measure 50/Pack
Delivery by Fri, Jun 27
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 25/Pack (15847)~#|#~m003904529_sc7
JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Fuchsia Pink, 25/Pack (15847)~#|#~m003904528_sc7
Item # : 263898
Model # : 15847
JAM Paper® Size #10 4 1/8" x 9 1/2" Brite hue ultra fuchsia hot pink paper envelope is perfect for greeting cards, invitations, weddings or any announcement and has a square gummed flap.
  • Size: #10 (4 1/8" x 9 1/2")
  • Closure: Gum
Price is $19.99
Unit of measure 25/Pack
Delivery by Fri, Jun 27
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JAM Paper A7 Invitation Envelopes, 5.25 x 7.25, Navy Blue, 25/Pack (LEBA717)~#|#~sp115351999_sc7
JAM Paper A7 Invitation Envelopes, 5.25 x 7.25, Navy Blue, 25/Pack (LEBA717)~#|#~sp115351997_sc7
Item # : 261700
Model # : LEBA717
  • Size: A7 (5 1/4" x 7 1/4")
  • Closure: Gum
Price is $16.69
Unit of measure 25/Pack
Delivery by Fri, Jun 27
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Green, 500/Pack (15862H)~#|#~sp111772450_sc7
JAM 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
  • Product Type: Brite Hue Recycled Envelope
  • Green recycled paper envelope
Price is $151.79
Unit of measure 500/Box
Free delivery by Fri, Jun 27
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JAM Paper Cellophane Envelope with Peel & Seal Closure, A7, 5.4375 x 7.375, Clear, 100/Pack (A7CELLO)~#|#~m000068417_sc7
Item # : 262895
Model # : A7CELLO
JAM Paper® A7 Clear 5 7/16 x 7 3/8 cello sleeves envelope in a pack of 100 has dimension of 5.4 x 0.1 x 7.4" and enhances the look of your greeting cards or promotions.
  • Size: 5 7/16" x 7 3/8"
  • Closure: Peal & seal
Price is $34.79
Unit of measure 100/Pack
Delivery by Fri, Jun 27
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Grocery Bag (4865-GB-50)~#|#~m000081708_sc7
Item # : 282370
Model # : 4865-GB-50
No reviews yet
LUX® A1 Envelope in grocery bag color measuring 3 5/8" x 5 1/8" is best suited for RSVP as well as announcements purposes and is sold as 50 per pack.
  • A1 Invitation Envelopes (3 5/8 x 5 1/8) are perfect for party invites/thank you cards/wedding invites/announcements
  • Comes in Grocery Bag, 70lb. Text Paper
Price is $19.19
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Holiday Red (FE4280-15-50)~#|#~m000082035_sc7
Item # : 282774
Model # : FE4280-15-50
LUX® Size A7 envelope in holiday red color measuring 5 1/4" x 7 1/4" has basis weight of 60 lbs features a smooth finish and is sold as 50 per pack.
  • A7 Invitation Envelopes (5 1/4 x 7 1/4) are perfect for party invites/thank you cards/wedding invites/announcements/5x7 photos
  • Comes in Holiday Red, 60lb. Text Paper
Price is $17.79
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 50/Pack, 80lb. White (4872-80W-50)~#|#~sp12274947_sc7
LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 50/Pack, 80lb. White (4872-80W-50)~#|#~sp12275067_sc7
Item # : 24161656
Model # : 4872-80W-50
LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) are perfect for Invitations, Greeting Cards, Thank You Cards, Announcements and so much more!
  • Dimensions: 4 1/4"L x 6 1/4"W
  • Sold 50 per box
Price is $23.79
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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Staples Gummed Inter-Departmental Envelopes, 10" x 13", Multi Colors, 100/Box (SPL487513)~#|#~s1224590_sc7
Staples Gummed Inter-Departmental Envelopes, 10" x 13", Multi Colors, 100/Box (SPL487513)~#|#~s1224589_sc7
Item # : 487513
Model # : ST19845
Send sensitive information throughout your building securely with these Staples personal and confidential interdepartmental envelopes.
  • Inter-departmental envelopes are easy to spot as being confidential
  • Envelope size: 13"H x 10"W
Price is $28.69
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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LUX Self Seal Security Tinted A2 Window Envelope, 4 3/8" x 5 3/4", White, 500/Pack (7486-W2-500)~#|#~sp14807383_sc7
Item # : 24260594
Model # : 7486-W2-500
LUX W-2 / 1099 Envelopes (5 3/4 x 8 7/8) in 24lb. White w/ Security Tint are perfect for mailing Checks, Invoices, Letterhead, Personal Letters, Statements, Direct Mail and more!
  • Dimensions: 5.75"L x 8.875"W
  • Comes in 24lb. White w/ Security Tint
Price is $102.09
Unit of measure 500/Pack
Free delivery by Wed, Jul 02
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JAM Paper #3 Coin Envelopes, 2 1/2" x 4 1/4", White, 100/Pack (1623183D)~#|#~C64E9FF1-91A4-4205-B6FAD7500FEA9341_sc7
Item # : 24557942
Model # : 1623183D
No reviews yet
  • Color: White
  • Size: #3 (2.5 x 4.25 inches)
Price is $19.99
Unit of measure 100/Pack
Delivery by Fri, Jun 27
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Quality Park Redi-Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA11118)~#|#~sp40286632_sc7
Quality Park Redi-Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA11118)~#|#~sp40286631_sc7
Item # : 458291
Model # : QUA11118
Send standard business mailings with this 500-pack of Quality Park Redi-Seal #10 self-sealing business envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white wove 24 lb. paper for durability
Price is $76.99
Unit of measure 500/Box
Free Next-Day eligible by tomorrow
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JAM Paper #15 1/2 Catalog Envelope, 12" x 15 1/2", Brown Kraft, 100/Pack (900493255)~#|#~sp111772336_sc7
JAM Paper #15 1/2 Catalog Envelope, 12" x 15 1/2", Brown Kraft, 100/Pack (900493255)~#|#~sp111772335_sc7
Item # : 24365023
Model # : 900493255
No reviews yet
  • Quantity: 100 per Pack
  • Fashioned from 28 lb paper and features a gum closure
Price is $55.09
Unit of measure 100/Pack
Free delivery by Fri, Jun 27
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LUX 6.5" x 9.5" Open End Envelopes 500/Pack, Grocery Bag (LUX-1645-GB-500)~#|#~sp5822112_sc7
LUX 6.5" x 9.5" Open End Envelopes 500/Pack, Grocery Bag (LUX-1645-GB-500)~#|#~A807ADEE-F355-48F6-929338B581F12426_sc7
Item # : 23996431
Model # : LUX-1645-GB-500
No reviews yet
LUX 6 1/2 x 9 1/2 Open End Envelopes perfect for organizing documents, distributing promotional and marketing materials, mailing, filing and much more!
  • Comes in Grocery Bag
  • Dimensions: 6.5"L x 9.5"W
Price is $112.81
Unit of measure 500/Pack
Free delivery by Wed, Jul 02
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JAM Paper 9 x 12 Booklet Commercial Window Envelopes, White, 50/Pack (223932I)~#|#~sp73452810_sc7
JAM Paper 9 x 12 Booklet Commercial Window Envelopes, White, 50/Pack (223932I)~#|#~sp73452724_sc7
Item # : 24365131
Model # : 223932I
  • White Envelope
  • Size: 9 x 12"
Price is $59.49
Unit of measure 50/Pack
Free delivery by Fri, Jun 27
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Navy (LUX-4880-103-50)~#|#~m005902344_sc7
LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Navy (LUX-4880-103-50)~#|#~m005823963_sc7
Item # : 282797
Model # : LUX-4880-103-50
LUX® Size A7 envelope with glue in navy color measuring 5 1/4" x 7 1/4" has basis weight of 80 lbs features a smooth finish and is sold as 50 per pack.
  • Navy
  • Size: A7 (5 1/4" x 7 1/4")
Price is $21.99
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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LUX 5 1/2 x 5 1/2 Square Envelopes 50/Pack, 80lb. Bright White (8515-80W-50)~#|#~sp14807960_sc7
Item # : 24260207
Model # : 8515-80W-50
No reviews yet
LUX 5 1/2 x 5 1/2 Square Envelopes in 80lb. Bright White are perfect for the Holidays, Invitations, Announcements, Sending Cards, and so much more!
  • Dimensions: 5.5"L x 5.5"W
  • Comes in 80lb. Bright White
Price is $16.19
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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LUX #10 All Purpose Window (4 1/8 x 9 1/2) 250/Box, 24lb. White w/ Sec Tint (WS-3133-250)~#|#~m004064002_sc7
Item # : 2146680
Model # : WS-3133-250
No reviews yet
LUX #10 All Purpose Window (4 1/8 x 9 1/2) are perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.
  • Comes in 24lb. White w/ Sec Tint, 24lb. Text Paper
  • Moistenable Glue Sealing Method
Price is $70.99
Unit of measure 250/Pack
Free delivery by Wed, Jul 02
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Price is $30.99
Unit of measure 100/Box
Delivery by Wed, Jun 25
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LUX A7 Z-Fold Invitation (5 x 7) 10/Pack, Navy (LUXA7ZF-103-10)~#|#~sp14807949_sc7
Item # : 24261021
Model # : LUXA7ZF-103-10
No reviews yet
LUX A7 Z-Fold Invitation (5 x 7) in Navy are perfect for wedding invitations, save the date cards, or event programs.
  • Dimensions: 5"L x 7"W
  • Comes in Navy
Price is $12.39
Unit of measure 10/Pack
Delivery by Wed, Jul 02
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Pack, 70lb. Bright White (20578-50)~#|#~sp14807747_sc7
Item # : 24260791
Model # : 20578-50
No reviews yet
LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) in 70lb. Bright White are perfect for the Holidays, Invitations, Announcements, Sending Cards, and so much more!
  • Dimensions: 4.75"L x 6.5"W
  • Comes in 70lb. Bright White
Price is $13.09
Unit of measure 50/Pack
Delivery by Wed, Jul 02
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There is something about a square flap on an envelope that denotes importance. It is no wonder then that many significant invitations and announcements are packaged in just such a wrapper. But don't make the mistake of thinking these classic mailers are just for personal use. Businesses can make a similar statement by choosing a square-flapped envelope, with or without a clear window. Peruse the dozens of options available from leading office supply brands like JAM Paper, LUX, and Staples.

Narrow Your Choices
Selecting a business envelope can be more daunting than you think. While it is nice to have choices, narrowing them down can be difficult. Square-flapped envelopes are available in dimensions ranging from 3 1/2" x 6" (the smallest commercial size available) to jumbo 13" x 19" mailers and everything in between, including the standard #10 envelope. As for color? Depending on your needs, 17 different color choices beckon, some with address windows, some without.

Not Quite Done Yet
You've determined your specific needs when it comes to color and size in a square-flapped envelope, but you're not quite done yet. Depending on what you are mailing, you may or may not need clear address windows. If you do need a window, how many and where should they be? Single left, single right, and double left windows are the most popular choices but not the only ones. A full-faced over-sized clear center window is also an option for special mailing projects.

Almost There
It should be apparent by now that the "one size fits all" days of business envelopes are long gone. As are the days when licking or using a sponge to seal them was the only choice. Yes, the old-school sealants are still available, but many other options are, too. Choose redi-seal strips that require no moisture or convenient peel-and-stick closures. Now that you have chosen your square envelope, purchase in packs of as few as 20 or as many as 1,000.