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Quality Park Redi-Seal Self Seal Security Tinted #8 Double Window Envelope 3 5/8" x 8 5/8", White Wove, 50/Pack (24539-50)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #8 Double Window Envelope 3 5/8" x 8 5/8", White Wove, 50/Pack (24539-50)~#|#~sp5875517_sc7
Item: 23995955
Model: 24539-50
Price is $59.69
Unit of measure 50/Pack
Free delivery by Tue, Feb 17
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Quality Park Ship-Lite First Class Tyvek Catalog Envelopes, 9x12"~#|#~s0293146_sc7
Item: 456561
Model: QUAS3615
No reviews yet
Price is $117.79
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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LUX Peel & Seel Self Seal #10 Window Envelope, 4 1/2" x 9 1/2", White, 50/Pack  (75761-50)~#|#~sp14807363_sc7
Item: 24260686
Model: 75761-50
Price is $26.09
Unit of measure 50/Pack
Delivery by Tue, Feb 17
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Staples Self Seal Catalog Envelopes, 10" x 13", White, 100/Box (SPL478157)~#|#~s1224502_sc7Staples Self Seal Catalog Envelopes, 10" x 13", White, 100/Box (SPL478157)~#|#~s1224632_sc7
Item: 478157
Model: ST19807-CC
Price is $43.19
Unit of measure 100/Box
Free delivery by Wed, Feb 11
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Quality Park Clasp & Moistenable Glue Kraft Catalog Envelope, 10" x 15", Brown Kraft, 100/Box (37798)~#|#~s0288241_sc7
Item: 510663
Model: QUA37798
Price is $48.99
Unit of measure 100/Box Price per unit $0.49/Envelope
Free delivery by Mon, Feb 09
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SURVIVOR Open Side Expansion Self Seal #13 Catalog Envelope, 10" x 13" x 2", White, 25/Pack (QUAR4611)~#|#~m002277816_sc7
Item: 2708498
Model: QUAR4611
Price is $99.29
Unit of measure 25/Pack
Free delivery by Mon, Feb 09
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Staples Tyvek EasyClose Catalog Envelopes, 12"L x 15.5"H, White, 100/Box (ST19869)~#|#~sp37069929_sc7
Item: 534941
Model: ST19869
Price is $132.59
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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Staples Gummed Kraft Catalog Envelopes, 10"L x 15"H, Brown, 100/Box (SPL534768)~#|#~s1224591_sc7Staples Gummed Kraft Catalog Envelopes, 10"L x 15"H, Brown, 100/Box (SPL534768)~#|#~s1224592_sc7
Item: 534768
Model: ST19820-CC
Price is $41.09
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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Staples EasyClose Booklet Envelopes, 12"L x 9"H, White, 100/Box (SPL570227)~#|#~D91FE8E2-A849-43D5-BB3A997F6A88F5E6_sc7Staples EasyClose Booklet Envelopes, 12"L x 9"H, White, 100/Box (SPL570227)~#|#~8A130193-3445-48A8-BF3E42EEEE242B50_sc7
Item: 570227
Model: ST19826-CC
Price is $46.39
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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Staples Gummed Kraft Catalog Envelopes, 9.5"L x 12.5"H, Brown, 100/Box (SPL534743)~#|#~s1224531_sc7Staples Gummed Kraft Catalog Envelopes, 9.5"L x 12.5"H, Brown, 100/Box (SPL534743)~#|#~s1224527_sc7
Item: 534743
Model: ST50194-CC
Price is $28.79
Unit of measure 100/Box
Delivery by Mon, Feb 09
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JAM Paper Peel & Seal Closure, Coin Envelopes, Brown Kraft Manila, 2.5" x 4.25", 100/Box (400238460D)~#|#~F111D8B7-EADB-4277-BBB2BF88E1A78981_sc7
Item: 24557955
Model: 400238460D
No reviews yet
Price is $14.89
Unit of measure 100/Pack
Delivery by Fri, Feb 13
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Quality Park Kraft Button & String Inter-Departmental Envelope 10" x 13", Brown, 100/Box (QUA63560)~#|#~sp43815062_sc7
Item: 377354
Model: QUA63560
Price is $83.89
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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JAM Paper #15 1/2 Catalog Envelope, 12" x 15 1/2", Brown Kraft, 100/Pack (900493255)~#|#~sp111772336_sc7JAM Paper #15 1/2 Catalog Envelope, 12" x 15 1/2", Brown Kraft, 100/Pack (900493255)~#|#~sp111772335_sc7
Item: 24365023
Model: 900493255
Price is $56.49
Unit of measure 100/Pack
Free delivery by Fri, Feb 13
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Staples Self Seal Kraft Catalog Envelopes, 10"L x 13"H, Brown, 100/Box (534818/19022)~#|#~3861058B-C75E-4836-BC1455B5BA1C6B5A_sc7Staples Self Seal Kraft Catalog Envelopes, 10"L x 13"H, Brown, 100/Box (534818/19022)~#|#~CBEE46E7-2A6A-4F88-B9A211A3AFAF28ED_sc7
Item: 534818
Model: ST534818-CC
Price is $57.49
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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JAM Paper 10" x 13" Open End Catalog Envelopes, White, 25/Pack (1623199)~#|#~sp111772499_sc7JAM Paper 10" x 13" Open End Catalog Envelopes, White, 25/Pack (1623199)~#|#~sp111772498_sc7
Item: 366708
Model: 1623199
Price is $17.09
Unit of measure 25/Pack
Delivery by Fri, Feb 13
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Staples Self Seal Kraft Catalog Envelopes, 9.5"L x 12.5"H, Brown, 100/Box (SPL381962)~#|#~94015978-EB59-48E9-925D68D69797573C_sc7Staples Self Seal Kraft Catalog Envelopes, 9.5"L x 12.5"H, Brown, 100/Box (SPL381962)~#|#~D9CAA66C-45D5-4A57-A2F5FDAFD57FCD32_sc7
Item: 381962
Model: ST50195
Price is $46.89
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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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 Tue, Feb 17
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Quality Park Redi-Seal Catalog Envelope, 6" x 9", White, 100/Box (43117)~#|#~s0171342_sc7
Item: 507910
Model: QUA43117
Price is $28.29
Unit of measure 100/Box
Delivery by Thu, Feb 12
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JAM Paper 9 x 12 Booklet Commercial Envelopes, White, 25/Pack (13751)~#|#~sp111772360_sc7JAM Paper 9 x 12 Booklet Commercial Envelopes, White, 25/Pack (13751)~#|#~sp111772359_sc7
Item: 366148
Model: 13751
Price is $16.59
Unit of measure 25/Pack
Delivery by Fri, Feb 13
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Quality Park Survivor Tyvek Self Seal Inter-Departmental Envelope 9" x 12", White, 100/Box (QUAR2400)~#|#~sp44488061_sc7Quality Park Survivor Tyvek Self Seal Inter-Departmental Envelope 9" x 12", White, 100/Box (QUAR2400)~#|#~sp44488060_sc7
Item: 70510
Model: QUAR2400
Price is $274.99
Unit of measure 100/Box
Free delivery by Wed, Feb 11
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Staples Self Seal #1 Catalog Envelopes, 6"L x 9"H, White, 100/Box (SPL609121)~#|#~6FB98856-FED3-4AAA-B3A77C841692C042_sc7Staples Self Seal #1 Catalog Envelopes, 6"L x 9"H, White, 100/Box (SPL609121)~#|#~3A8317F0-2080-42E0-A7E34F518DF6E0E0_sc7
Item: 609121
Model: ST50160-CC
Price is $33.89
Unit of measure 100/Box
Delivery by Mon, Feb 09
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Quality Park Clasp & Moistenable Glue Kraft Catalog Envelope, 12" x 15 1/2", Kraft, 100/Box (37810)~#|#~s0288241_sc7
Item: 510664
Model: QUA37810
Price is $87.89
Unit of measure 100/Box Price per unit $0.88/Envelope
Free delivery by Mon, Feb 09
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Staples Self Seal Kraft Catalog Envelopes, 9"L x 12"H, Brown, 250/Box (486931/14245)~#|#~s1224510_sc7Staples Self Seal Kraft Catalog Envelopes, 9"L x 12"H, Brown, 250/Box (486931/14245)~#|#~s1224508_sc7
Item: 486931
Model: ST486931-CC
Price is $71.79
Unit of measure 250/Box Price per unit $0.29/Envelope
Free delivery by Mon, Feb 09
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Quality Park Clasp & Moistenable Glue Kraft Catalog Envelope, 6 1/2" x 9 1/2", Kraft, 100/Box (37763)~#|#~s0288241_sc7
Item: 377518
Model: QUA37763
No reviews yet
Price is $39.69
Unit of measure 100/Box
Free delivery by Mon, Feb 09
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Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 25/Box (594410/19001)~#|#~8BE98924-BED3-48EF-B5079EBBDEABF373_sc7Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 25/Box (594410/19001)~#|#~C43D0B5D-A276-4A92-B17CF5097E74D5C4_sc7
Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 25/Box (594410/19001) is In-store only
Item: 594410
Model: 50291/594410/19
Price is $6.49
Unit of measure 25/Pack
30-min pickup
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.