Square Envelopes

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 Tue, Sep 29
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Staples Booklet Envelopes, 6" × 9", Side‑Opening, Gummed Flap, White Wove Paper, 250/Box~#|#~038B3DE6-4E4D-4BE5-9C4D6E42BA7860C6_sc7Staples Booklet Envelopes, 6" × 9", Side‑Opening, Gummed Flap, White Wove Paper, 250/Box~#|#~BDA8191C-C984-42E0-9077BC227644B0F7_sc7
Item: 472852
Model: ST472852-CC
Price is $45.99
Unit of measure 250/Box Price per unit $0.18/Envelope
Free delivery by Mon, Sep 28
30-min pickup
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Staples 10 x 13 Kraft Clasp & Gummed Catalog Envelopes, Brown Manila, Strong Metal Clasp Closure, 250/Box~#|#~815A8A70-058D-4331-8083B3AD5F9617B9_sc7Staples 10 x 13 Kraft Clasp & Gummed Catalog Envelopes, Brown Manila, Strong Metal Clasp Closure, 250/Box~#|#~1112B2A1-F768-45F7-9D1BF7E21CD9BF2E_sc7
Item: 487494
Model: ST487494-CC
Price is $74.79
Unit of measure 250/Box Price per unit $0.30/Envelope
Free delivery by Mon, Sep 28
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JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, White, 25/Pack (31820)~#|#~m003904578_sc7JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, White, 25/Pack (31820)~#|#~m003904577_sc7
Item: 365874
Model: 31820
Price is $9.89
Unit of measure 25/Pack
Delivery by Wed, Sep 30
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JAM Paper A7 Parchment Invitation Envelopes, 5.25 x 7.25, Natural Recycled, 25/Pack (35394)~#|#~sp136742284_sc7JAM Paper A7 Parchment Invitation Envelopes, 5.25 x 7.25, Natural Recycled, 25/Pack (35394)~#|#~sp136742279_sc7
Item: 263958
Model: 35394
Price is $11.49
Unit of measure 25/Pack
Delivery by Wed, Sep 30
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Staples 6.5 x 9.5 Kraft Clasp Envelopes, Brown, Gummed Flap & Metal Clasp Closure, Ideal for Filing, Storing & Mailing, 100/Pack~#|#~DF34FCED-9018-4740-B720A2AC7BB40409_sc7Staples 6.5 x 9.5 Kraft Clasp Envelopes, Brown, Gummed Flap & Metal Clasp Closure, Ideal for Filing, Storing & Mailing, 100/Pack~#|#~9709DD15-6320-4CB3-B50BD6DB18366F35_sc7
Item: 534990
Model: ST534990-CC
Price is $31.09
Unit of measure 100/Box Price per unit $0.31/Envelope
Delivery by Mon, Sep 28
30-min pickup
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Staples Laser Form Double‑Window Business Envelopes, White, Security‑Tinted Gummed Closure, 9" x 4.2", 500/Pack~#|#~98F8178F-0805-4EA4-BD6B3386BC119E79_sc7Staples Laser Form Double‑Window Business Envelopes, White, Security‑Tinted Gummed Closure, 9" x 4.2", 500/Pack~#|#~7CC0D6A4-3F5C-487D-8365CB48550DEE0C_sc7
Item: 473949
Model: ST473949-CC
Price is $36.49
Unit of measure 500/Box Price per unit $0.07/Envelope
Free delivery by Mon, Sep 28
30-min pickup
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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
Delivery by Mon, Sep 28
30-min pickup
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Staples Poly Envelopes, Side‑Opening Document Sleeves with String & Button Closure, Durable Poly Construction, 5/Pack~#|#~676D38D2-4E46-4901-953D90C0F89E4B4F_sc7Staples Poly Envelopes, Side‑Opening Document Sleeves with String & Button Closure, Durable Poly Construction, 5/Pack~#|#~2A31369B-A17A-47E8-8E8159B7E5856F08_sc7
Item: 599609
Model: TR34530-CC
Price is $13.59
Unit of measure 5/Pack Price per unit $2.72/Envelope
Delivery by Mon, Sep 28
30-min pickup
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Staples #10 Self‑Sealing Envelopes, White, Quick Close Adhesive, Professional Mailing Envelopes, 500/Box~#|#~1D22CEC3-EF53-4FB5-A5BA1C460E01583A_sc7Staples #10 Self‑Sealing Envelopes, White, Quick Close Adhesive, Professional Mailing Envelopes, 500/Box~#|#~1DDEEC0B-AA88-4AF4-80F52C96DE579C95_sc7
Item: 570240
Model: ST570240-CC
Price is $32.29
Unit of measure 500/Box Price per unit $0.06/Envelope
Delivery by Mon, Sep 28
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Quality Park Clasp & Moistenable Glue Kraft Catalog Envelopes, 8.75" x 11.5", Brown Kraft, 100/Box (QUA37787)~#|#~sp42116469_sc7
Item: 507832
Model: QUA37787
Price is $65.99
Unit of measure 100/Box Price per unit $0.66/Envelope
Free delivery by Mon, Sep 28
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Staples #6 3/4 EasyClose White Envelopes, Self‑Seal Convenience Mailers, 100/Box~#|#~s1223331_sc7Staples #6 3/4 EasyClose White Envelopes, Self‑Seal Convenience Mailers, 100/Box~#|#~s1223330_sc7
Item: 487506
Model: ST14011-CC
Price is $14.99
Unit of measure 100/Box
Delivery by Mon, Sep 28
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Staples #10 QuickStrip EasyClose Business Envelopes, White, Peel & Seal, Security‑Tinted, 9.5" x 4.125", 100/Pack~#|#~9D61BF36-F926-4189-B751F8BE3F66B083_sc7Staples #10 QuickStrip EasyClose Business Envelopes, White, Peel & Seal, Security‑Tinted, 9.5" x 4.125", 100/Pack~#|#~B2C81072-7CD5-46C7-9F58781765042EC9_sc7
Item: 329841
Model: ST21573-CC
Price is $27.79
Unit of measure 100/Box Price per unit $0.28/Envelope
Delivery by Mon, Sep 28
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Staples 12 x 15.5 Clasp & Moistenable Glue Kraft Catalog Envelopes, Brown, Heavy‑Duty Mailing Envelopes for Documents, 100/Box~#|#~1024C779-48F4-4858-BB08B0202991BBED_sc7Staples 12 x 15.5 Clasp & Moistenable Glue Kraft Catalog Envelopes, Brown, Heavy‑Duty Mailing Envelopes for Documents, 100/Box~#|#~B8D8D2D6-92A3-4E22-8546B46FCC96F7FF_sc7
Item: 472902
Model: ST472902-CC
Price is $37.79
Unit of measure 100/Box Price per unit $0.38/Envelope
Free delivery by Mon, Sep 28
30-min pickup
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Staples Kraft Catalog Envelopes, 6" x 9", Manila, 100/Box (918765/19381)~#|#~1EAD5BA2-0976-46CA-BBEA97B3FB8D3172_sc7Staples Kraft Catalog Envelopes, 6" x 9", Manila, 100/Box (918765/19381)~#|#~88C76ECC-62AA-45A2-B328C10D79BB2FBC_sc7
Item: 918765
Model: ST918765-CC
Price is $20.59
Unit of measure 100/Box Price per unit $0.21/Envelope
Delivery by Mon, Sep 28
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Staples 10 x 13 Heavy‑Duty Clasp Catalog Envelopes, 32 lb Manila Kraft, Reinforced Metal Clasp & Gummed Seal, 100/Box~#|#~900C7171-E213-4AEF-9F779A9CF4C65C44_sc7Staples 10 x 13 Heavy‑Duty Clasp Catalog Envelopes, 32 lb Manila Kraft, Reinforced Metal Clasp & Gummed Seal, 100/Box~#|#~03E02B1F-86E8-41AD-AA0EB94942AB30D4_sc7
Item: 122069
Model: ST122069-CC
Price is $46.79
Unit of measure 100/Box Price per unit $0.47/Envelope
Free delivery by Mon, Sep 28
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Staples 9 x 12 Gummed Catalog Envelopes, White Wove, Durable Mailing Envelopes for Documents & Letters, 100/Box~#|#~C5E12C4F-C941-437B-A9E0035CB1DA97F9_sc7Staples 9 x 12 Gummed Catalog Envelopes, White Wove, Durable Mailing Envelopes for Documents & Letters, 100/Box~#|#~864F4B23-2902-48C7-879B2ADB6A4399B8_sc7
Item: 472886
Model: ST472886N-CC
Price is $36.99
Unit of measure 100/Box Price per unit $0.37/Envelope
Free delivery by Mon, Sep 28
30-min pickup
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Staples 6 x 9 Economy Catalog Envelopes, White Wove, Gummed Flap Seal, Lightweight Document Mailers, 250/Box~#|#~6DD124EA-BF63-439C-8FF4231A21C323E5_sc7Staples 6 x 9 Economy Catalog Envelopes, White Wove, Gummed Flap Seal, Lightweight Document Mailers, 250/Box~#|#~6A28413A-6788-4D2E-A8D2E4F3120AA800_sc7
Item: 247668
Model: ST50303-CC
Price is $33.09
Unit of measure 250/Box Price per unit $0.13/Envelope
Delivery by Mon, Sep 28
30-min pickup
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Staples QuickStrip EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (394047N)~#|#~874C076E-30E1-4019-BCAD79AF3EE8E1F6_sc7Staples QuickStrip EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (394047N)~#|#~1ED15A4C-99F0-44F1-B454A42378FDEB93_sc7
Item: 394047
Model: ST394047N-CC
Price is $11.79
Unit of measure 100/Box
Delivery by Thu, Oct 01
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Quality Park Redi-Seal Self Seal #10 Double Window Envelope, 4 1/2" x 9 1/2", White Wove, 250/Pack (24559-QP-250)~#|#~s1196808_sc7
Item: 23995341
Model: 24559-QP-250
Price is $90.19
Unit of measure 250/Pack
Free delivery by Mon, Oct 05
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Staples 10 x 13 Self‑Sealing Catalog Envelopes, White Wove, Peel & Seal Strong Closure, Heavyweight Mailing Envelopes, 100/Box~#|#~s1224632_sc7
Item: 478157
Model: ST19807-CC
Price is $43.19
Unit of measure 100/Box
Free delivery by Mon, Sep 28
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Staples Booklet Envelopes, 9" × 12", Side‑Opening, White Wove Paper, Durable Construction, 100/Box~#|#~C25F6457-B752-4CCE-92C76AEF9248412F_sc7Staples Booklet Envelopes, 9" × 12", Side‑Opening, White Wove Paper, Durable Construction, 100/Box~#|#~7176E32C-DD4A-49B3-904D04684937ED94_sc7
Item: 473009
Model: ST473009-CC
Price is $33.89
Unit of measure 100/Box Price per unit $0.34/Envelope
Delivery by Mon, Sep 28
30-min pickup
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Staples 10 x 13 First‑Class Catalog Envelopes, White Wove, QuickStrip EasyClose Peel & Seal, Green Diamond Border, 100/Pack~#|#~s1224517_sc7Staples 10 x 13 First‑Class Catalog Envelopes, White Wove, QuickStrip EasyClose Peel & Seal, Green Diamond Border, 100/Pack~#|#~s1224516_sc7
Item: 486930
Model: ST50188-CC
Price is $46.39
Unit of measure 100/Box Price per unit $0.46/Envelope
Free delivery by Mon, Sep 28
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Staples 9.5 x 12.5 Kraft Clasp Envelopes, Brown, Heavyweight Open‑End Mailers with Metal Clasp & Gummed Flap, 100/Box~#|#~E968CCD2-6185-4CD2-B55B622EE7927DD1_sc7Staples 9.5 x 12.5 Kraft Clasp Envelopes, Brown, Heavyweight Open‑End Mailers with Metal Clasp & Gummed Flap, 100/Box~#|#~ACFEF361-8B3E-4AE3-9E357B00F9DC63E3_sc7
Item: 535013
Model: ST17745-CC
Price is $43.99
Unit of measure 100/Box Price per unit $0.44/Envelope
Free delivery by Mon, Sep 28
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Staples 6.5 x 9.5 Kraft Catalog Envelopes, Brown, Durable Heavyweight Mailing Envelopes for Documents & Small Inserts, 100/Box~#|#~s1224528_sc7
Item: 534701
Model: ST50162-CC
Price is $34.89
Unit of measure 100/Box
Delivery by Mon, Sep 28
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Staples 14 x 18 Jumbo Catalog Envelopes, Brown Kraft, Ungummed Open‑End Mailers for Large Documents & Flat Items, 25/Box~#|#~s1224479_sc7Staples 14 x 18 Jumbo Catalog Envelopes, Brown Kraft, Ungummed Open‑End Mailers for Large Documents & Flat Items, 25/Box~#|#~s1224538_sc7
Item: 195776
Model: ST50154-CC
Price is $28.69
Unit of measure 25/Pack
Delivery by Mon, Sep 28
30-min pickup
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Staples Double‑Window Business Envelopes, White, Gummed Closure, 9" x 4.2", 1000/Pack~#|#~A8D8B9B1-CADD-4023-A4E6812D7A1F6233_sc7Staples Double‑Window Business Envelopes, White, Gummed Closure, 9" x 4.2", 1000/Pack~#|#~BECCA8B3-A385-4BBE-83E1777454C6A573_sc7
Item: 381911
Model: ST381911-CC
Price is $73.59
Unit of measure 1000/Box Price per unit $0.07/Envelope
Free delivery by Mon, Sep 28
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Staples 10 x 13 White Wove Clasp & Gummed Catalog Envelopes, Metal Clasp Closure, Durable Large Mailing Envelopes, 100/Box~#|#~9AB4797E-631F-4BD0-A0BDD7F74D0F2D46_sc7Staples 10 x 13 White Wove Clasp & Gummed Catalog Envelopes, Metal Clasp Closure, Durable Large Mailing Envelopes, 100/Box~#|#~5018FFCA-4FFD-4A76-8F24EDE2471A7CC7_sc7
Item: 570231
Model: ST570231N-CC
Price is $42.99
Unit of measure 100/Box
Free delivery by Mon, Sep 28
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Staples Gummed Kraft Catalog Envelopes, 6" x 9", Brown, 500/Box (ST381944-CC)~#|#~s1224539_sc7Staples Gummed Kraft Catalog Envelopes, 6" x 9", Brown, 500/Box (ST381944-CC)~#|#~s1224619_sc7
Item: 381944
Model: ST381944-CC
Price is $49.89
Unit of measure 500/Box Price per unit $0.10/Envelope
Free delivery by Mon, Sep 28
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Staples 5 x 5 White Open‑End CD/DVD Envelopes, Protective Media Sleeves, 50/Box~#|#~9EDB4B2F-CCE2-4A77-AE8DC4F85D10FB27_sc7Staples 5 x 5 White Open‑End CD/DVD Envelopes, Protective Media Sleeves, 50/Box~#|#~C560EFB7-1918-4376-A28DD11D5D228A9E_sc7
Item: 459599
Model: ST12257-CC
Price is $12.09
Unit of measure 50/Box Price per unit $0.24/Envelope
Delivery by Mon, Sep 28
30-min pickup
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Quality Park Redi-Seal Self Seal Security Tinted #8 Double Window Envelope, 3 5/8" x 8 5/8", White, 250/Pack (24539-250)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #8 Double Window Envelope, 3 5/8" x 8 5/8", White, 250/Pack (24539-250)~#|#~sp5875517_sc7
Item: 23995962
Model: 24539-250
Price is $92.89
Unit of measure 250/Pack
Free delivery by Mon, Oct 05
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Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 50/Pack (24529-50)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 50/Pack (24529-50)~#|#~s1196808_sc7
Item: 23996120
Model: 24529-50
Price is $40.09
Unit of measure 50/Pack
Free delivery by Mon, Oct 05
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Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 250/Pack (24529-250)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 250/Pack (24529-250)~#|#~s1196808_sc7
Item: 23996116
Model: 24529-250
Price is $91.39
Unit of measure 250/Pack
Free delivery by Mon, Oct 05
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Staples Currency Envelopes, 3.5" × 6.5", Brown Kraft, Gummed Flap Seal, Durable Paper Stock, 500/Box~#|#~s1223637_sc7Staples Currency Envelopes, 3.5" × 6.5", Brown Kraft, Gummed Flap Seal, Durable Paper Stock, 500/Box~#|#~15E9FCB6-1765-4A4F-B8ABCBF226DF98C6_sc7
Item: 535112
Model: ST19850-CC
Price is $33.49
Unit of measure 500/Box Price per unit $0.07/Envelope
Delivery by Mon, Sep 28
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Staples Self Seal Security Tinted Catalog Envelopes, 9" x 12", White, 100/Box (21574)~#|#~AF163F2A-06DD-4CF6-9E41767088802991_sc7Staples Self Seal Security Tinted Catalog Envelopes, 9" x 12", White, 100/Box (21574)~#|#~232984CB-C05E-4DBB-A6F2212997A74DC9_sc7
Item: 329845
Model: ST21574-CC
Price is $88.39
Unit of measure 100/Box Price per unit $0.88/Envelope
Free delivery by Mon, Sep 28
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Staples Tyvek 10 x 13 EasyClose Catalog Envelopes, White with Green Diamond Border, Tear‑Resistant & Waterproof Mailers, 100/Box~#|#~sp37727759_sc7Staples Tyvek 10 x 13 EasyClose Catalog Envelopes, White with Green Diamond Border, Tear‑Resistant & Waterproof Mailers, 100/Box~#|#~sp37727758_sc7
Item: 534966
Model: ST19855-CC
Price is $79.39
Unit of measure 100/Box Price per unit $0.79/Envelope
Free delivery by Mon, Sep 28
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LUX Double Window Envelope, 3 5/8" x 8 7/8", Bright White, 250/Pack (57633-250)~#|#~sp14807327_sc7
Item: 24261333
Model: 57633-250
Price is $92.49
Unit of measure 250/Pack
Free delivery by Mon, Oct 05
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Quality Park Clasp & Moistenable Glue Catalog Envelopes, 5" x 7.5", Brown Kraft, 100/Box (QUA37835)~#|#~sp42116471_sc7
Item: QUA37835
Model: QUA37835
Price is $40.89
Unit of measure Box
Free delivery by Tue, Sep 29
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Jam Paper Plastic File Pocket, Letter Size, Assorted, 6/Pack (218V0ASSRT)~#|#~sp4211585_sc7Jam Paper Plastic File Pocket, Letter Size, Assorted, 6/Pack (218V0ASSRT)~#|#~sp4211584_sc7
Item: 2477999
Model: 218V0ASSRT
Price is $17.39
Unit of measure 6/Pack Price per unit $2.90/File Jacket
Delivery by Wed, Sep 30
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Quality Park Redi-Seal Self Seal Security Tinted #10 Double Window Envelope, 4 1/2" x 9 1/2", White Wove, 50/Pack (24559-QP-50)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #10 Double Window Envelope, 4 1/2" x 9 1/2", White Wove, 50/Pack (24559-QP-50)~#|#~sp5875503_sc7
Item: 23996473
Model: 24559-QP-50
Price is $42.69
Unit of measure 50/Pack
Free delivery by Mon, Oct 05
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Page 1 of 3
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.