Sponsored Products
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Square Envelopes

JAM Paper A9 Invitation Envelopes, 5.75 x 8.75, White, 25/Pack (4023213)~#|#~m003904861_sc7JAM Paper A9 Invitation Envelopes, 5.75 x 8.75, White, 25/Pack (4023213)~#|#~m003904860_sc7
Item: 366015
Model: 4023213
Price is $9.49
Unit of measure 25/Pack
Delivery by Fri, Apr 24
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Staples Laser Security Tinted Double Window Envelopes, 3 5/8" x 8 7/8", Wove White, 500/Box (ST394062-CC)~#|#~C39630DD-6A75-47E8-8D8FD913E48BEAD0_sc7Staples Laser Security Tinted Double Window Envelopes, 3 5/8" x 8 7/8", Wove White, 500/Box (ST394062-CC)~#|#~79F8C193-D873-4D92-AF21E923C116C374_sc7
Item: 394062
Model: ST394062-CC
Price is $30.49
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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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 $29.49
Unit of measure Box
Next-Day Delivery by tomorrow
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Lilac (SH4280-05-50)~#|#~m005902349_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Lilac (SH4280-05-50)~#|#~m005823955_sc7
Item: 282783
Model: SH4280-05-50
Price is $17.09
Unit of measure 50/Pack
Delivery by Wed, Apr 29
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JAM Paper Kraft Catalog Envelope 9" x 12", Brown Kraft, 50/Pack (4132I)~#|#~sp61031357_sc7JAM Paper Kraft Catalog Envelope 9" x 12", Brown Kraft, 50/Pack (4132I)~#|#~sp61031138_sc7
Item: 24175227
Model: 4132I
Price is $14.79
Unit of measure 50/Pack Price per unit $0.30/Envelope
Delivery by Fri, Apr 24
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JAM Paper A7 Foil Lined Invitation Envelopes, 5.25 x 7.25, Ecru with Gold Foil, 50/Pack (2354150I)~#|#~sp137086016_sc7
Item: 1589213
Model: 2354150I
No reviews yet
Price is $36.49
Unit of measure 50/Pack
Free delivery by Fri, Apr 24
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JAM Paper Premium Kraft Catalog Envelope 10" x 13", Brown Kraft Manila, 100/Pack (V018286)~#|#~sp95009064_sc7JAM Paper Premium Kraft Catalog Envelope 10" x 13", Brown Kraft Manila, 100/Pack (V018286)~#|#~sp95008938_sc7
Item: 261963
Model: V018286
Price is $31.19
Unit of measure 100/Pack Price per unit $0.31/Envelope
Delivery by Fri, Apr 24
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JAM Paper 6.5" x 6.5" Square Translucent Vellum Invitation Envelopes, Burgundy, 25/Pack (2813778)~#|#~m000227245_sc7
Item: 38080
Model: 2813778
No reviews yet
Price is $25.99
Unit of measure 25/Pack
Delivery by Fri, Apr 24
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Quality Park Clasp Nonstandard Kraft Catalog Envelope, 10" x 13", Gray, 100/Box (QUA38597)~#|#~s0269137_sc7
Item: 696593
Model: QUA38597
Price is $46.29
Unit of measure 100/Box
Free Next-Day eligible by tomorrow
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70 lb 4" x 4" Peel & Press Square Envelopes, Natural, 50/Pack~#|#~m001149705_sc7
Item: 1029952
Model: 8504-01-50
Price is $15.59
Delivery by Wed, Apr 29
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JAM Paper Gummed A7 Invitation Envelopes, 7 1/4" x 5 1/4", Regular White, 100/Pack (73767C)~#|#~sp59510334_sc7JAM Paper Gummed A7 Invitation Envelopes, 7 1/4" x 5 1/4", Regular White, 100/Pack (73767C)~#|#~sp59510400_sc7
Item: 2103272
Model: 73767C
Price is $26.19
Unit of measure 100/Pack
Delivery by Fri, Apr 24
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Staples EasyClose Self Seal #10 1/2 Kraft Catalog Envelope, 9" x 12", Brown, 250/Box (ST479888-CC)~#|#~s1224497_sc7Staples EasyClose Self Seal #10 1/2 Kraft Catalog Envelope, 9" x 12", Brown, 250/Box (ST479888-CC)~#|#~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 Gummed Booklet Envelopes, 9" x 12", White, 100/Box (473009/19307)~#|#~C25F6457-B752-4CCE-92C76AEF9248412F_sc7Staples Gummed Booklet Envelopes, 9" x 12", White, 100/Box (473009/19307)~#|#~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
Next-Day Delivery by tomorrow
30-min pickup
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Staples Kraft Catalog Envelopes, 6" x 9", Manila, 100/Box (918765/19381)~#|#~962003A1-4C21-42FB-8D65365FE763202C_sc7Staples Kraft Catalog Envelopes, 6" x 9", Manila, 100/Box (918765/19381)~#|#~FD91972A-05A3-428C-AF19005AA385028D_sc7
Item: 918765
Model: ST918765-CC
Price is $20.59
Unit of measure 100/Box Price per unit $0.21/Envelope
Next-Day Delivery by tomorrow
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JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, White, 50/Pack (31820I)~#|#~m003904578_sc7JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, White, 50/Pack (31820I)~#|#~m003904577_sc7
Item: 1588932
Model: 31820I
Price is $10.29
Unit of measure 50/Pack
Delivery by Fri, Apr 24
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JAM Paper Gummed A2 Invitation Envelopes, 5 3/4" x 4 3/8", White, 100/Pack (MOOP6250LDIC)~#|#~sp64339628_sc7JAM Paper Gummed A2 Invitation Envelopes, 5 3/4" x 4 3/8", White, 100/Pack (MOOP6250LDIC)~#|#~sp64340093_sc7
Item: 2103327
Model: MOOP6250LDIC
Price is $24.49
Unit of measure 100/Pack
Delivery by Fri, Apr 24
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Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (50306)~#|#~s1223617_sc7Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (50306)~#|#~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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Staples EasyClose Booklet Envelopes, 6" x 9", White, 250/Box (SPL570225)~#|#~599BB8BC-D424-47B7-9A797CE6D154AC4F_sc7Staples EasyClose Booklet Envelopes, 6" x 9", White, 250/Box (SPL570225)~#|#~D2D35CE7-9235-4C11-9294C7A1362B8A2C_sc7
Item: 570225
Model: ST50157
Price is $51.99
Unit of measure 250/Box Price per unit $0.21/Envelope
Free Next-Day eligible by tomorrow
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Staples QuickStrip EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Assorted Colors, 50/Pack (ST23431-CC)~#|#~5C561CBB-1963-4D64-A85EEA57A8AF559B_sc7Staples QuickStrip EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Assorted Colors, 50/Pack (ST23431-CC)~#|#~F7756BA6-CC51-48E2-AF9D153F6450886B_sc7
Item: 122725
Model: ST23431-CC
Price is $11.79
Unit of measure 50/Pack
Next-Day Delivery by tomorrow
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Candy Pink (EX4880-14-50)~#|#~m000082014_sc7
Item: 282745
Model: EX4880-14-50
Price is $23.19
Unit of measure 50/Pack
Delivery by Wed, Apr 29
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Seafoam (LUX-4880-113250)~#|#~m005902348_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Seafoam (LUX-4880-113250)~#|#~m005823969_sc7
Item: 517491
Model: LUX-4880-113250
No reviews yet
Price is $59.69
Free delivery by Wed, Apr 29
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LUX 9" x 12" Open End Window Envelopes, Grocery Bag~#|#~m001406663_sc7
Item: 1277748
Model: 1590-GB-50
No reviews yet
Price is $22.49
Unit of measure 50/Pack
Delivery by Wed, Apr 29
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Staples QuickStrip EasyClose #6 3/4 Business Envelopes, 3 5/8" x 6 1/2", White, 100/Box (14011)~#|#~s1223331_sc7Staples QuickStrip EasyClose #6 3/4 Business Envelopes, 3 5/8" x 6 1/2", White, 100/Box (14011)~#|#~s1223330_sc7
Item: 487506
Model: ST14011-CC
Price is $14.99
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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Quality Park Fashion Clasp & Moistenable Glue Catalog Envelope, 9" x 12", Blue, 10/Pack (38737)~#|#~s0171297_sc7
Item: QUA38737
Model: QUA38737
No reviews yet
Price is $13.19
Unit of measure Pack
Next-Day Delivery by tomorrow
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, 24lb. White~#|#~m004064012_sc7
Item: 2146371
Model: 51867-MI-50
No reviews yet
Price is $12.69
Unit of measure 50/Pack
Delivery by Wed, Apr 29
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JAM Paper A7 Strathmore Invitation Envelopes, 5.25 x 7.25, Natural White Wove, 25/Pack (44507)~#|#~m007159137_sc7JAM Paper A7 Strathmore Invitation Envelopes, 5.25 x 7.25, Natural White Wove, 25/Pack (44507)~#|#~m007159136_sc7
Item: 263994
Model: 44507
No reviews yet
Price is $12.69
Unit of measure 25/Pack
Delivery by Fri, Apr 24
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Staples Button & String Inter-Departmental Kraft Envelopes, 10" x 13", Brown Kraft, 100/Box (50163/472993)~#|#~9D274A67-108B-4C47-A39C329CA2BD2CDB_sc7Staples Button & String Inter-Departmental Kraft Envelopes, 10" x 13", Brown Kraft, 100/Box (50163/472993)~#|#~B7B7C031-D58A-412B-A1812F2C1BE4CC96_sc7
Item: 472993
Model: ST50163-CC
Price is $59.79
Unit of measure 100/Box
Free Next-Day eligible by tomorrow
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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 Wed, Apr 29
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Quality Park Self Seal A2 Invitation Envelope 4 3/8" x 5 3/4", White, 100/Box (QUA10740)~#|#~sp43812739_sc7Quality Park Self Seal A2 Invitation Envelope 4 3/8" x 5 3/4", White, 100/Box (QUA10740)~#|#~sp43812738_sc7
Item: 582032
Model: QUA10740
Price is $25.59
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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Quality Park Clasp Catalog Envelope, 6 1/2" x 9 1/2", Kraft, 100/Box (37863)~#|#~s0462609_sc7
Item: QUA37863
Model: QUA37863
Price is $33.99
Unit of measure Box
Next-Day Delivery by tomorrow
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JAM Paper A9 Invitation Envelope, 5 3/4" x 8 3/4", White, 100/Pack (4023213C)~#|#~m002934506_sc7JAM Paper A9 Invitation Envelope, 5 3/4" x 8 3/4", White, 100/Pack (4023213C)~#|#~m002934505_sc7
Item: 2103322
Model: 4023213C
Price is $29.09
Unit of measure 100/Pack
Delivery by Fri, Apr 24
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LUX #10 All Purpose Window (4 1/8 x 9 1/2) 500/Box, 24lb. White w/ Sec Tint (WS-3133-500)~#|#~m004064002_sc7
Item: 2146676
Model: WS-3133-500
Price is $135.29
Unit of measure 500/Pack
Free delivery by Wed, Apr 29
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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 Wed, Apr 29
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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 Wed, Apr 22
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Pool (LUX-4880-102-50)~#|#~m005902343_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Pool (LUX-4880-102-50)~#|#~m005823964_sc7
Item: 282812
Model: LUX-4880-102-50
No reviews yet
Price is $22.49
Unit of measure 50/Pack
Delivery by Wed, Apr 29
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JAM Paper #7 Kraft Coin Envelope, 3 1/2" x 6 1/2", Brown Kraft, 50/Pack (95125I)~#|#~sp64338509_sc7JAM Paper #7 Kraft Coin Envelope, 3 1/2" x 6 1/2", Brown Kraft, 50/Pack (95125I)~#|#~sp64338508_sc7
Item: 2633114
Model: 95125I
Price is $10.39
Unit of measure 50/Pack
Delivery by Fri, Apr 24
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Over 30
Staples Adhesive Inter-Departmental Kraft Envelope, 10" x 13", Brown, 100/Box (SPL391542)~#|#~s1224491_sc7Staples Adhesive Inter-Departmental Kraft Envelope, 10" x 13", Brown, 100/Box (SPL391542)~#|#~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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Over 30
Quality Park 18" x 23" Tyvek® Jumbo Catalog Envelopes, 25/Box~#|#~s0288247_sc7
Item: QUAR5121
Model: QUAR5121
No reviews yet
Price is $187.09
Unit of measure Box
Free delivery by Wed, Apr 22
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Over 30

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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.