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Square Envelopes

Staples #10 EasyClose Security‑Tint Envelopes, White, Self‑Seal, 4 1/8" x 9 1/2", 100/Box~#|#~04BF5D88-0DCB-4C46-8A97D67F61C726B8_sc7Staples #10 EasyClose Security‑Tint Envelopes, White, Self‑Seal, 4 1/8" x 9 1/2", 100/Box~#|#~F7FF46B5-6BB8-466E-99786E7BF515AACC_sc7
Item: 394057
Model: ST50308-CC
Price is $10.79
Unit of measure 100/Box Price per unit $0.11/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples #10 QuickStrip EasyClose Business Envelopes, White, Security‑Tinted, Peel & Seal Closure, 9.5" x 4.125", 500/Box~#|#~s1223639_sc7
Item: 787385
Model: ST50312-CC
Price is $27.69
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples 9 x 12 Kraft Clasp & Moistenable Envelopes, Brown Manila, Heavyweight Document Mailers with Metal Clasp, 100/Box~#|#~78475DB5-FE94-47A1-BD414BEF4047E6F8_sc7Staples 9 x 12 Kraft Clasp & Moistenable Envelopes, Brown Manila, Heavyweight Document Mailers with Metal Clasp, 100/Box~#|#~463CD40E-CDA8-4E06-91B95BA912506815_sc7
Item: 187021
Model: ST187021-CC
Price is $27.29
Unit of measure 100/Box Price per unit $0.27/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples 9 x 12 Catalog Mailing Envelopes, White Wove, QuickStrip EasyClose Peel & Seal, Strong Self‑Seal Closure, 100/Pack~#|#~8B7D8301-A106-47D2-9346A753590113EF_sc7Staples 9 x 12 Catalog Mailing Envelopes, White Wove, QuickStrip EasyClose Peel & Seal, Strong Self‑Seal Closure, 100/Pack~#|#~0CA4F8BE-F4B3-4D06-8F04C5B15E189C3C_sc7
Item: 379479
Model: ST379479-CC
Price is $27.49
Unit of measure 100/Box Price per unit $0.28/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Quality Park Clasp Nonstandard Kraft Catalog Envelope, 10" x 13", Light Kraft, 100/Box (QUA38197)~#|#~s0171283_sc7
Item: 813547
Model: QUA38197
Price is $56.49
Unit of measure 100/Box
Free Next-Day eligible by tomorrow
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Staples Kraft Clasp & Moistenable Glue Catalog Envelopes, 10" x 13", Brown, 100/Box (ST187039-CC)~#|#~27C9B96E-F97A-4128-92E49D560D038946_sc7Staples Kraft Clasp & Moistenable Glue Catalog Envelopes, 10" x 13", Brown, 100/Box (ST187039-CC)~#|#~C070EB62-2654-4D15-A8D7EBA0EF3D971A_sc7
Item: 187039
Model: ST187039-CC
Price is $35.99
Unit of measure 100/Box Price per unit $0.36/Envelope
Free Next-Day eligible by tomorrow
30-min pickup
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Staples QuickStrip EasyClose Kraft Self Seal Catalog Envelopes, 9" x 12", Brown, 100/Box (ST381970-CC)~#|#~s1224480_sc7Staples QuickStrip EasyClose Kraft Self Seal Catalog Envelopes, 9" x 12", Brown, 100/Box (ST381970-CC)~#|#~s1224481_sc7
Item: 381970
Model: ST381970-CC
Price is $25.99
Unit of measure 100/Box Price per unit $0.26/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples 10 x 13 Kraft Clasp Envelopes, Brown, Durable Metal Clasp & Gummed Seal, 12/Pack~#|#~BAD43E8C-7FDB-4D8A-91C3D83A06FF1BF4_sc7Staples 10 x 13 Kraft Clasp Envelopes, Brown, Durable Metal Clasp & Gummed Seal, 12/Pack~#|#~16CF4CC2-8E68-491E-B35FBDF79FAA3FC3_sc7
Item: 594413
Model: ST19005/19005
Price is $8.89
Unit of measure 12/Pack Price per unit $0.74/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples 9 x 12 Kraft Clasp Envelopes, Brown, Reinforced Metal Clasp & Gummed Seal, Heavyweight Mailers, 12/Pack~#|#~34EFE56B-DFD2-4A72-895EEF2358F5A8F1_sc7Staples 9 x 12 Kraft Clasp Envelopes, Brown, Reinforced Metal Clasp & Gummed Seal, Heavyweight Mailers, 12/Pack~#|#~s1223347_sc7
Item: 594412
Model: ST19004-CC
Price is $6.19
Unit of measure 12/Pack Price per unit $0.52/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples EasyClose Kraft Catalog Envelopes, 10"L x 13"H, Brown, 100/Box (381969/19023)~#|#~F8D38AFF-BF1B-44BA-927E4BAD0395E984_sc7Staples EasyClose Kraft Catalog Envelopes, 10"L x 13"H, Brown, 100/Box (381969/19023)~#|#~27E9D898-F83D-4F24-B0E6E539E0F6853D_sc7
Item: 381969
Model: ST381969-CC
Price is $34.29
Unit of measure 100/Box Price per unit $0.34/Envelope
Next-Day Delivery by tomorrow
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Staples Kraft Clasp & Moistenable Glue Catalog Envelopes, 6" x 9", Brown, 100/Box (ST186999-CC)~#|#~A58AD89A-A58D-4AA2-8EBFA1E057038E70_sc7Staples Kraft Clasp & Moistenable Glue Catalog Envelopes, 6" x 9", Brown, 100/Box (ST186999-CC)~#|#~C9039305-CAF7-4C8D-88EFD56BC29583B6_sc7
Item: 186999
Model: ST186999-CC
Price is $20.69
Unit of measure 100/Box Price per unit $0.21/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Mead Press It Seal It #10 Security Envelopes, 4 1/8" x 9 1/2", White, 45/Pack (MEA75026)~#|#~m007116469_sc7
Item: 2696277
Model: 75026
Price is $6.19
Unit of measure 45/Pack
Next-Day Delivery by tomorrow
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Staples #6 3/4 QuickStrip EasyClose Security‑Tinted Business Envelopes, 3 5/8" x 6 1/2", White, 50/Box~#|#~37F2D5CE-8A5E-49FC-A5FCEF34AC652B96_sc7Staples #6 3/4 QuickStrip EasyClose Security‑Tinted Business Envelopes, 3 5/8" x 6 1/2", White, 50/Box~#|#~8C2500BC-A88D-48CD-B934455268FC04AC_sc7
Item: 862999
Model: ST862999-CC
Price is $5.89
Unit of measure 50/Box Price per unit $0.12/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples #10 Security‑Tinted Window Envelopes, White, Self‑Seal Peel & Seal Closure, 500/Box~#|#~06821414-15D3-4B18-A5F0A3B87C9D8448_sc7
Item: 511290
Model: ST511290-CC
Price is $30.99
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
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Staples EasyClose Catalog Envelopes, 10"L x 13"H, White, 250/Box (SPL479886)~#|#~s1224630_sc7Staples EasyClose Catalog Envelopes, 10"L x 13"H, White, 250/Box (SPL479886)~#|#~s1224574_sc7
Item: 479886
Model: ST19785-CC
Price is $53.99
Unit of measure 250/Box
Free delivery by Mon, Jun 29
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Staples 5.75" x 8.75" White Wove Self‑Seal Greeting Card Envelopes, Premium Stationery Mailers, 100/Box~#|#~EB89E0A5-2ECE-4700-9BF5E55295E34138_sc7Staples 5.75" x 8.75" White Wove Self‑Seal Greeting Card Envelopes, Premium Stationery Mailers, 100/Box~#|#~2ECC89D3-7BF2-48B2-B461F0F032E15A05_sc7
Item: 394063
Model: ST394063/394063
Price is $11.49
Unit of measure 100/Box Price per unit $0.12/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples 9 x 12 Kraft Clasp Envelopes, Brown Manila, Reinforced Metal Clasp & Gummed Seal, Heavy‑Duty Mailing Envelopes, 250/Pack~#|#~F1549B31-0676-494D-84110CF619EACA98_sc7Staples 9 x 12 Kraft Clasp Envelopes, Brown Manila, Reinforced Metal Clasp & Gummed Seal, Heavy‑Duty Mailing Envelopes, 250/Pack~#|#~B523903F-E765-4FFA-92425FAAE9DC5790_sc7
Item: 487493
Model: ST487493-CC
Price is $51.29
Unit of measure 250/Box Price per unit $0.20/Envelope
Free Next-Day eligible by tomorrow
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Staples #10 QuickStrip EasyClose Business Envelopes, White, Peel & Seal, Security‑Tinted, 9.5" x 4.125", 500/Pack~#|#~s1223617_sc7Staples #10 QuickStrip EasyClose Business Envelopes, White, Peel & Seal, Security‑Tinted, 9.5" x 4.125", 500/Pack~#|#~s1223598_sc7
Item: 381912
Model: ST50306-CC
Price is $32.19
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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JAM Paper Open End Kraft Catalog Envelopes, 12" x 15 1/2", Brown Kraft, 25/Pack (900493255A)~#|#~sp111772336_sc7JAM Paper Open End Kraft Catalog Envelopes, 12" x 15 1/2", Brown Kraft, 25/Pack (900493255A)~#|#~sp111772335_sc7
Item: 24365032
Model: 900493255A
Price is $12.49
Unit of measure 25/Pack Price per unit $0.50/Envelope
Delivery by Wed, Jul 01
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JAM Paper Gummed A7 Invitation Envelopes, 5 1/4" x 7 1/4", White, 25/Pack (73767)~#|#~sp70241006_sc7JAM Paper Gummed A7 Invitation Envelopes, 5 1/4" x 7 1/4", White, 25/Pack (73767)~#|#~sp70241005_sc7
Item: 365929
Model: 73767
Price is $8.19
Unit of measure 25/Pack
Delivery by Wed, Jul 01
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Staples 9 x 12 EasyClose Catalog Envelopes, Brown Kraft, Self‑Seal, Durable Heavyweight Mailing Envelopes, 250/Box~#|#~s1224495_sc7
Item: 479888
Model: ST479888-CC
Price is $66.29
Unit of measure 250/Box Price per unit $0.26/Envelope
Free Next-Day eligible by tomorrow
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Staples QuickStrip EasyClose Self Seal #1 Catalog Envelopes, 6" x 9", White, 100/Box (ST892099N-CC)~#|#~s1224614_sc7Staples QuickStrip EasyClose Self Seal #1 Catalog Envelopes, 6" x 9", White, 100/Box (ST892099N-CC)~#|#~s1224615_sc7
Item: 892099
Model: ST892099N-CC
Price is $16.69
Unit of measure 100/Box Price per unit $0.17/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples 12 x 15.5 Clasp & Moistenable Glue Kraft Catalog Envelopes, Brown, Heavy‑Duty Mailing Envelopes for Documents, 100/Box~#|#~B1A7E20E-7195-4296-BBDAB29BDF33CF88_sc7Staples 12 x 15.5 Clasp & Moistenable Glue Kraft Catalog Envelopes, Brown, Heavy‑Duty Mailing Envelopes for Documents, 100/Box~#|#~DB5E5BDD-D14D-45AA-924C1B2B4A473ACB_sc7
Item: 472902
Model: ST472902-CC
Price is $37.79
Unit of measure 100/Box Price per unit $0.38/Envelope
Free Next-Day eligible by tomorrow
30-min pickup
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Quality Park Clasp Catalog Envelope, 10" x 13", Kraft, 250/Box (37597)~#|#~s0293058_sc7Quality Park Clasp Catalog Envelope, 10" x 13", Kraft, 250/Box (37597)~#|#~s0171250_sc7
Item: QUA37597
Model: QUA37597
No reviews yet
Price is $214.39
Unit of measure Box
Free delivery by Mon, Jun 29
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Staples #9 QuickStrip Self‑Seal Envelopes, White, Fast Close Design, Business Mailing Envelopes, 500/Box~#|#~s1223622_sc7
Item: 570235
Model: ST570235N-CC
Price is $34.99
Unit of measure 500/Box Price per unit $0.07/Envelope
Next-Day Delivery by tomorrow
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Staples 6 x 9 EasyClose Catalog Envelopes, Kraft, Self‑Seal Closure, Strong Mailing Envelopes for Small Documents, 100/Box~#|#~s1224581_sc7Staples 6 x 9 EasyClose Catalog Envelopes, Kraft, Self‑Seal Closure, Strong Mailing Envelopes for Small Documents, 100/Box~#|#~s1224583_sc7
Item: 892100
Model: ST20140/20140
Price is $22.19
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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Quality Park Redi-Strip Catalog Envelope, 9" x 12", White, 100/Box (QUA41415)~#|#~s0440350_sc7Quality Park Redi-Strip Catalog Envelope, 9" x 12", White, 100/Box (QUA41415)~#|#~s1172753_sc7
Item: 660652
Model: QUA41415
Price is $45.19
Unit of measure 100/Box Price per unit $0.45/Envelope
Free Next-Day eligible by tomorrow
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Staples Gummed Catalog Envelopes, 9" x 12", White, 25/Pack (ST579712N-CC)~#|#~s1224537_sc7Staples Gummed Catalog Envelopes, 9" x 12", White, 25/Pack (ST579712N-CC)~#|#~s1224546_sc7
Item: 579712
Model: ST579712N-CC
Price is $11.29
Unit of measure 25/Pack
Delivery by Mon, Jun 29
30-min pickup
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JAM Paper Self Seal Catalog Envelope, 6" x 9", Brown Kraft Manila, 100/Pack (13034199D)~#|#~C616D0E0-5A69-4A77-864CFE0A197D1E8B_sc7
Item: 24557951
Model: 13034199D
Price is $28.29
Unit of measure 100/Pack
Delivery by Wed, Jul 01
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JAM Paper Self-Seal Catalog Envelope 10" x 13", Brown Kraft Manila, 100/Pack (13034233D)~#|#~FC4A4974-E404-47B4-857A31AC4A500A39_sc7
Item: 24557999
Model: 13034233D
Price is $45.19
Unit of measure 100/Pack
Free delivery by Wed, Jul 01
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Quality Park Redi-Seal Kraft Catalog Envelope, 9" x 12", Brown, 100/Box (43511)~#|#~s0341571_sc7
Item: 802220
Model: QUA43511
Price is $25.99
Unit of measure 100/Box
Delivery by Mon, Jun 29
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Quality Park® 28lb. Clasp Colored Catalog Envelopes, Grey Kraft, 9x12", 100/Box~#|#~s0269137_sc7Quality Park® 28lb. Clasp Colored Catalog Envelopes, Grey Kraft, 9x12", 100/Box~#|#~s0171289_sc7
Item: QUA38590
Model: QUA38590
Price is $45.59
Unit of measure Box
Free Next-Day eligible by tomorrow
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Staples Brights Greeting Card Envelopes, Assorted Colors, 50/Box~#|#~48C2A8AC-D1CC-4BD8-ACB5BCE3347A927F_sc7Staples Brights Greeting Card Envelopes, Assorted Colors, 50/Box~#|#~F35DCCC7-7F8B-41E5-B73BC9B1E41C2F6C_sc7
Item: 902097
Model: ST20558-CC
Price is $9.59
Unit of measure 50/Box
Next-Day Delivery by tomorrow
30-min pickup
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Staples #6 3/4 QuickStrip EasyClose Security‑Tinted Business Envelopes, White, Self‑Seal, 6.5" x 3.625", 100/Pack~#|#~s1223597_sc7Staples #6 3/4 QuickStrip EasyClose Security‑Tinted Business Envelopes, White, Self‑Seal, 6.5" x 3.625", 100/Pack~#|#~s1223609_sc7
Item: 862857
Model: ST50313-CC
Price is $11.19
Unit of measure 100/Box Price per unit $0.11/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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Staples Adhesive Inter‑Departmental Envelopes, 10" × 13", Brown Kraft, Self‑Adhesive Closure, 100/Box~#|#~s1224491_sc7Staples Adhesive Inter‑Departmental Envelopes, 10" × 13", Brown Kraft, Self‑Adhesive Closure, 100/Box~#|#~F9261A1D-5B3F-4B12-8244C640E93F0C5E_sc7
Item: 391542
Model: ST19852-CC
Price is $36.79
Unit of measure 100/Box
Free Next-Day eligible 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.