Square Envelopes
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Envelope Size
Envelope Type
Envelope Closure
Envelope Number
Envelope Material
Item # : 23996463
Model # : LUX-1645-56-500
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 Midnight Black
- Dimensions: 6.5"L x 9.5"W
Price is $123.56
Unit of measure 500/Pack
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Item # : 282360
Model # : 5365-11-50
Lux® Size A1 envelope in copper metallic color is best suited for RSVP as well as occasions calling for a dainty announcements and measures 3 5/8" x 5 1/8", 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 Copper Metallic, 80lb. Text Paper
Price is $18.49
Unit of measure 50/Pack
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Item # : 282285
Model # : LUX-8545-103-50
Lux® Square envelope in navy color measuring 7" x 7" offers a bit of sparkle to your event and comes with a with contour flap, is sold as 50 per pack.
- 7 x 7 Square Envelopes are perfect for announcements/weddings/greeting cards/invitations
- Comes in Navy, 80lb. Text Paper
Price is $29.69
Unit of measure 50/Pack
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Item # : 282430
Model # : 5370-02-50
LUX® Size A2 envelope in aquamarine metallic color measuring 4 3/8" x 5 3/4" is best suited for letter writers and it is designed to hold a quarter folded sheet of paper and is sold as 50 per pack.
- A2 (4 3/8 x 5 3/4) - Metallics - Aquamarine are perfect for party invites/thank you cards/wedding invites/announcements
- Comes in Aquamarine Metallic, 80lb. Text Paper
Price is $18.09
Unit of measure 50/Pack
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Item # : 387846
Model # : FE4280-15-250
LUX® A7 Envelope measuring 5 1/4" x 7 1/4" in holiday red color is compatible with laser and inkjet while is the best collection for social, advertisement functions, sold as 250 per box.
- 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 $50.39
Unit of measure 250/Box
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Item # : 262904
Model # : 9.25X12.25CELLO
JAM Paper® Clear 9 1/4 x 12 1/4 cello sleeves envelope in a pack of 100 has dimension of 9.2 x 0.1 x 12.2" and enhances the look of your greeting cards or promotions.
- Size: 9 1/4" x 12 1/4"
- Closure: Peal & seal
Price is $93.59
Unit of measure 100/Pack
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Item # : 507912
Model # : QUA43862
Ship marketing materials, mailers and a variety of professional documents with this box of 250 brown kraft self-sealing catalog envelopes.
- Catalog envelope is a reliable choice for multiple kinds of personal and business mailing purposes
- Made from brown kraft paper that conceals contents from prying eyes
Price is $161.49
Unit of measure 250/Carton
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Item # : 24261037
Model # : 8525-15-50
LUX 6 x 6 Square Envelopes in Holiday Red are perfect for the Holidays, Invitations, Announcements, Sending Cards, and so much more!
- Dimensions: 6"L x 6"W
- Comes in Holiday Red
Price is $14.29
Unit of measure 50/Pack
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Item # : 262125
Model # : 74354
JAM Paper® 5 1/2" x 5 1/2" clear translucent envelope in a pack of 25 is perfect for greeting cards, invitations or any other announcements and is made from natural vellum paper.
- Clear
- Size: 5 1/2" x 5 1/2"
Price is $30.99
Unit of measure 25/Pack
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Item # : 387831
Model # : FE4275-15-1000
LUX® A6 Envelope measuring 4 3/4" x 6 1/2" in holiday red color is compatible with laser and inkjet while is the best collection for social, advertisement functions, sold as 1000 per box.
- A6 Invitation Envelopes (4 3/4 x 6 1/2) are perfect to use for sending invitations/greeting cards/RSVP's/thank you cards/gifts for birthdays/graduations/holidays
- Comes in Holiday Red, 60lb. Text Paper
Price is $119.89
Unit of measure 1000/Box
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Item # : 282498
Model # : 5370-08-50
LUX® Size A2 envelope in quartz metallic color measuring 4 3/8" x 5 3/4" is best suited for letter writers while it is designed to hold a quarter folded sheet of paper and is sold as 50 per pack.
- A2 (4 3/8 x 5 3/4) - Metallics - Quartz are perfect for party invites/thank you cards/wedding invites/announcements
- Comes in Quartz Metallic, 80lb. Text Paper
Price is $18.00
Unit of measure 50/Pack
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Item # : 262936
Model # : 9.2512.25CELLOB
JAM Paper® Cello sleeves envelope in a carton of 1000 having dimension 9 1/4 x 12 1/4" is used to protect the greeting cards from damage and weighs 12.5 lbs.
- Size: 9 1/4" x 12 1/4"
- Closure: Self adhesive
Price is $520.99
Unit of measure 1000/Carton
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Item # : 2147437
Model # : INVDW-102-500
LUX Double Window Invoice Envelopes (4 1/8 x 9 1/8) are perfect for sending letters, invoices or statements.
- Peel & Press Sealing Method
- Invoice Double Window Envelopes w/ Peel & Press (4 1/8 x 9 1/8) - Pool Blue 500/PK
Price is $98.79
Unit of measure 500/Pack
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Item # : 261360
Model # : 211817116
JAM Paper® 5 3/4" x 8 3/4" Ivory A9 envelope in a pack of 25 is perfect for greeting cards and weddings making your invitation a sparkle.
- Size: A9 (5 3/4" x 8 3/4")
- Closure: Gum
Price is $41.09
Unit of measure 25/Pack
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Over 30
Item # : 947673
Model # : SLE12162WS
Expandable Ship-Lite Envelope is six times stronger than paper envelope.
- Made from white paper reinforced with mesh screen poly fibers
- Envelopes are moisture resistant
Price is $152.99
Unit of measure 100/Carton Price per unit $1.53/Case
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Item # : 514681
Model # : CCA7-500
LUX® Envelope in crystal clear color measuring A7 (5 1/4" x 7 1/4") features an elegant square flap and is perfect for social or announcement functions, sold as 500 per box.
- 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 Crystal Clear, 3.5 Mil Text Paper
Price is $122.29
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Item # : 282429
Model # : 5370-15-50
LUX® Size A2 envelope in anthracite metallic color measuring 4 3/8" x 5 3/4" is best suited for letter writers and it is designed to hold a quarter folded sheet of paper and is sold as 50 per pack.
- A2 (4 3/8 x 5 3/4) - Metallics - Anthracite are perfect for party invites/thank you cards/wedding invites/announcements
- Comes in Anthracite Metallic, 80lb. Text Paper
Price is $17.29
Unit of measure 50/Pack
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Item # : 507771
Model # : QUA36417
Quality Park Size 6 Invitation envelope in white color is ideal for use with computer generated cards and invitations, sold as 100 per box.
- 4-3/4" x 6-1/2"
- Gummed square flap
Price is $50.09
Unit of measure 100/Box
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Item # : 1588470
Model # : 3992321I
The JAM Paper 11.5" x 11.5" white envelope is an ideal medium to send your cordial invitations for a wide variety of occasions.
- White envelope
- Blank interior for personalized message
Price is $70.59
Unit of measure 50/Pack
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Item # : 24260478
Model # : 4872-07-50
LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) in Gold Metallic are perfect for the Holidays, Invitations, Announcements, Sending Cards, and so much more!
- Dimensions: 4.25"L x 6.25"W
- Comes in Gold Metallic
Price is $17.99
Unit of measure 50/Pack
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Item # : 1589498
Model # : 920B1PU
The JAM Paper index 7.5" x 5.5" button string closure letter booklet plastic envelope helps you manage and organize your receipts, tax papers and a number of other important documents.
- Product Type: Letter Booklet Envelope
- Purple plastic envelope
Price is $27.49
Unit of measure 12/Pack
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Item # : 282844
Model # : FLWH4880-02-50
LUX® Size A7 envelope in white with black 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.
- White/black LUX lining
- Size: A7 (5 1/4" x 7 1/4")
Price is $34.79
Unit of measure 50/Pack
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Item # : 261358
Model # : 155630
JAM Paper® A8 Size light baby blue paper invitation envelope in a pack of 25 has dimension of 5 1/2" x 8 1/8" and is perfect for greeting cards, invitations or other announcements.
- Size: A8 (5 1/2" x 8 1/8")
- Closure: Gum
Price is $15.79
Unit of measure 25/Pack
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Item # : 24260336
Model # : 8250-500
LUX 9 x 12 Open End Envelopes in 28lb. Bright White are perfect for Catalogs, Annual Reports, Brochures, Magazines, Invitations and more!
- Dimensions: 9"L x 12"W
- Comes in 28lb. Bright White
Price is $98.59
Unit of measure 500/Pack
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Item # : 534651
Model # : SPL534651
Seal important mail securely with this 100-pack of Staples EasyClose Tyvek 10 x 13-inch expandable first-class catalog envelopes.
- Catalog envelopes are a convenient and reliable choice for personal and business mailing purposes
- Comes in white and made of Tyvek
Price is $336.29
Unit of measure 100/Box
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Item # : 1589223
Model # : GCST708I
The JAM Paper A7 gold stardream metallic envelope features a closure that can be easily opened and closed for your convenience.
- Gold stardream metallic envelope
- Blank interior for personalized message
Price is $49.59
Unit of measure 50/Pack
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Item # : 1589532
Model # : 96151H
The JAM Paper A7 ultra lime brite hue recycled envelope is an ideal medium to send your cordial invitations for a wide variety of occasions.
- Ultra lime brite hue recycled envelope
- Blank interior for personalized message
Price is $84.69
Unit of measure 250/Box
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Item # : 24260765
Model # : EX1CO-27-250
LUX #1 Coin Envelopes (2 1/4 x 3 1/2) in Avocado are perfect for the HOLIDAYS, Weddings, Parties, Place Cards, small parts and more!
- Dimensions: 2.25"L x 3.5"W
- Comes in Avocado
Price is $37.09
Unit of measure 250/Pack
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Item # : 1590005
Model # : 563916908H
The JAM Paper A8 presidential blue dark base envelope bears a touch of creativity while carrying your invitations or messages with utmost safety.
- Presidential blue dark base envelope
- Blank interior for personalized message
Price is $98.99
Unit of measure 250/Box
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Item # : 282941
Model # : 5395-08-50
LUX® Size A9 envelope in quartz metallic color measuring 5 3/4" x 8 3/4" has a basis weight of 80 lbs and is sold as 50 per pack.
- Quartz metallic
- Size: A9 (5 3/4" x 8 3/4")
Price is $33.89
Unit of measure 50/Pack
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Item # : 388051
Model # : PHGC1-250
LUX® Photo greeting envelope measuring 4 3/8" x 8 1/4" in bright white color features a paper weight of 70 lbs which is ideal for use in invitations and notecards, sold as 250 per box.
- Photo Greeting Invitation Envelopes (4 3/8 x 8 1/4) are our most popular envelope for invitations/announcements/greeting cards/photos/notecards
- Comes in 70lb. Bright White, 70lb. Text Paper
Price is $56.56
Unit of measure 250/Box
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Item # : 24261045
Model # : LUX-4897-113-50
LUX 10 x 13 Open End Envelopes in Seafoam are perfect for Catalogs, Annual Reports, Brochures, Magazines, Invitations and more!
- Dimensions: 10"L x 13"W
- Comes in Seafoam
Price is $39.19
Unit of measure 50/Pack
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Item # : 385689
Model # : 83478-250
LUX® Jumbo Envelope in brown kraft color measuring 11" x 17" with a paper weight of 28 lbs is used for sending flat, heavy materials or many small items like coins, catalogs and jumbo cards, sold as 250 per box.
- Brown Kraft
- Size: 11" x 17"
Price is $226.19
Unit of measure 250/Box
Trending now
13% off of Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50312-CC)
Price is $24.99, Regular price was $28.79, You save 13%
Unit of measure 500/Box Price per unit $0.05/Envelope
Next-Day Delivery by tomorrow
1-hr pickup
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15% off of Glad 13 Gallon Trash Bag, 8.5"x8.5", Low Density, .72 mil, White, 100 Bags/Box (CLO 78526)
Price is $16.39, Regular price was $19.39, You save 15%
Unit of measure 100/Box Price per unit $0.16/bag
Next-Day Delivery by tomorrow
1-hr pickup
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13% off of Staples Notepads, 8.5" x 11.75", Wide Ruled, White, 50 Sheets/Pad, Dozen (ST57339M/57339)
Price is $16.99, Regular price was $19.59, You save 13%
Unit of measure Dozen Price per unit $1.42/Pad
Next-Day Delivery by tomorrow
1-hr pickup
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13% off of Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (ST50308-CC)
Price is $7.99, Regular price was $9.29, You save 13%
Unit of measure 100/Box Price per unit $0.08/Envelope
Next-Day Delivery by tomorrow
1-hr pickup
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11% off of Staples 30% Recycled File Folders, 1/3-Cut Tab, Letter Size, Manila, 250/Box (ST56673-CC)
Price is $27.99, Regular price was $31.69, You save 11%
Unit of measure 250/Box Price per unit $0.11/File Folder
Next-Day Delivery by tomorrow
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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.
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.