JAM Paper 6.5 x 6.5 Square Metallic Invitation Envelopes, Stardream Silver, 25/Pack (GCST509)~#|#~m004672426_sc7JAM Paper 6.5 x 6.5 Square Metallic Invitation Envelopes, Stardream Silver, 25/Pack (GCST509)~#|#~m004672425_sc7
Item: 261996
Model: GCST509
No reviews yet
Price is $33.99
Unit of measure 25/Pack
Delivery by Fri, May 16
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JAM Paper 6 x 6 Square Invitation Envelopes, Dark Grey, Bulk 250/Box (36396439H)~#|#~m004671979_sc7JAM Paper 6 x 6 Square Invitation Envelopes, Dark Grey, Bulk 250/Box (36396439H)~#|#~m004671978_sc7
Item: 1589822
Model: 36396439H
No reviews yet
Price is $283.99
Unit of measure 250/Box
Free delivery by Fri, May 16
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JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Racing Green, 25/Pack (1591938)~#|#~sp73452816_sc7JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Racing Green, 25/Pack (1591938)~#|#~sp73452719_sc7
Item: 263708
Model: 1591938
No reviews yet
Price is $33.39
Unit of measure 25/Pack
Delivery by Fri, May 16
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JAM Paper Self Seal Invitation Envelopes, 5 1/4" x 5 1/4", Seafoam Green, 50/Pack (8510-113-50)~#|#~sp225303144_sc7JAM Paper Self Seal Invitation Envelopes, 5 1/4" x 5 1/4", Seafoam Green, 50/Pack (8510-113-50)~#|#~sp225303142_sc7
Item: 24578297
Model: 8510-113-50
No reviews yet
Price is $14.99
Unit of measure 50/Pack
Delivery by Fri, May 16
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JAM Paper A10 Invitation Envelope, 6" x 9 1/2", White, 1000/Carton (12039B)~#|#~sp115352023_sc7JAM Paper A10 Invitation Envelope, 6" x 9 1/2", White, 1000/Carton (12039B)~#|#~sp115352019_sc7
Item: 366314
Model: 12039B
No reviews yet
Price is $207.69
Unit of measure 1000/Carton
Free delivery by Fri, May 16
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LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 500/Box, 80lb. Bright White (72973-80W-500)~#|#~m001149707_sc7
Item: 1028601
Model: 72973-80W-500
No reviews yet
Price is $105.49
Free delivery by Tue, May 20
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JAM Paper 6.5 x 6.5 Square Translucent Vellum Envelopes, Leaf Green, 50/Pack (1592115I)~#|#~m002168281_sc7
Item: 1588384
Model: 1592115I
No reviews yet
Price is $58.99
Unit of measure 50/Pack
Free delivery by Fri, May 16
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Bronze Metallic (5365-12-50)~#|#~m000081692_sc7
Item: 282354
Model: 5365-12-50
No reviews yet
Price is $13.79
Unit of measure 50/Pack
Delivery by Tue, May 20
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Navy (LUX-4865-103-50)~#|#~m000081724_sc7
Item: 282387
Model: LUX-4865-103-50
Price is $13.59
Unit of measure 50/Pack
Delivery by Tue, May 20
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JAM Paper 4Bar A1 Colored Invitation Envelopes, 3.625 x 5.125, Green Recycled, 25/Pack (15811)~#|#~m003904521_sc7JAM Paper 4Bar A1 Colored Invitation Envelopes, 3.625 x 5.125, Green Recycled, 25/Pack (15811)~#|#~m003904520_sc7
Item: 263917
Model: 15811
No reviews yet
Price is $10.09
Unit of measure 25/Pack
Delivery by Fri, May 16
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JAM Paper Tear-Proof Tyvek Open End Catalog Envelopes, 11.5" x 14.5", Black, 25/Pack (V021386)~#|#~sp61031314_sc7JAM Paper Tear-Proof Tyvek Open End Catalog Envelopes, 11.5" x 14.5", Black, 25/Pack (V021386)~#|#~sp61031280_sc7
Item: 261828
Model: V021386
Price is $71.39
Unit of measure 25/Pack
Free delivery by Fri, May 16
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JAM Paper #7 Coin Business Colored Envelopes, 3.5 x 6.5, Red Recycled, 25/Pack (355228282)~#|#~m002934588_sc7JAM Paper #7 Coin Business Colored Envelopes, 3.5 x 6.5, Red Recycled, 25/Pack (355228282)~#|#~m002934587_sc7
Item: 1589512
Model: 355228282
No reviews yet
Price is $9.99
Unit of measure 25/Pack
Delivery by Fri, May 16
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LUX A7 Gatefold Invitation (5 x 7) 100/Pack, Black Linen (A7GF-BLI-100)~#|#~sp14807752_sc7
Item: 24260784
Model: A7GF-BLI-100
No reviews yet
Price is $64.09
Unit of measure 100/Pack
Free delivery by Tue, May 20
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, Citrus (FE4275-20-50)~#|#~m000081904_sc7
Item: 282599
Model: FE4275-20-50
No reviews yet
Price is $18.29
Unit of measure 50/Pack
Delivery by Tue, May 20
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Copper Metallic (5380-11-250)~#|#~m000081698_sc7
Item: 515676
Model: 5380-11-250
Price is $161.19
Free delivery by Tue, May 20
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LUX 28lbs. 11" x 17" Open End Flap Jumbo Envelopes, Bright White, 1000/BX~#|#~m000161319_sc7
Item: 385903
Model: 85923-1000
No reviews yet
Price is $845.69
Unit of measure 1000/Box
Free delivery by Tue, May 20
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JAM Paper A7 Metallic Invitation Envelopes, 5.25 x 7.25, Stardream Malachite Deep Green, Bulk 250/Box (GCST703H)~#|#~m002168965_sc7
Item: 1590152
Model: GCST703H
No reviews yet
Price is $204.69
Unit of measure 250/Box
Free delivery by Fri, May 16
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LUX 6" x 9" Button & String Envelopes, 500/Box, 28lb. White (69BS-28W-500)~#|#~DA021BDB-1755-497A-87B444D11E81DD8F_sc7LUX 6" x 9" Button & String Envelopes, 500/Box, 28lb. White (69BS-28W-500)~#|#~2356E461-C43B-413E-9D05342A3AEAAB86_sc7
Item: 2444629
Model: 69BS-28W-500
No reviews yet
Price is $404.89
Unit of measure 500/Pack
Free delivery by Tue, May 20
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Silver Metallic (5380-06-250)~#|#~m005902308_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Silver Metallic (5380-06-250)~#|#~m000081736_sc7
Item: 515748
Model: 5380-06-250
Price is $96.69
Free delivery by Tue, May 20
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JAM Paper #11 Policy Business Envelopes, 4.5 x 10.375, White, Bulk 500/Box (1623187H)~#|#~sp123308118_sc7JAM Paper #11 Policy Business Envelopes, 4.5 x 10.375, White, Bulk 500/Box (1623187H)~#|#~sp123308117_sc7
Item: 1589896
Model: 1623187H
No reviews yet
Price is $227.99
Unit of measure 500/Box
Free delivery by Fri, May 16
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JAM Paper A2 Colored Invitation Envelopes, 4 3/8" x 5 3/4", Assorted Colors, 150/Pack (956A2brogvy)~#|#~10C3ADA3-FBCA-40C0-89A924CFF897F9D5_sc7JAM Paper A2 Colored Invitation Envelopes, 4 3/8" x 5 3/4", Assorted Colors, 150/Pack (956A2brogvy)~#|#~6F3A3927-F991-4684-ACE84A5599DE2D8A_sc7
Item: 24175052
Model: 956A2BROGVY
Price is $44.09
Unit of measure 150/Pack
Free delivery by Fri, May 16
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JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Blue Recycled, 25/Pack (54093)~#|#~m003904598_sc7JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Blue Recycled, 25/Pack (54093)~#|#~m003904597_sc7
Item: 263912
Model: 54093
Price is $11.19
Unit of measure 25/Pack
Delivery by Fri, May 16
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JAM Paper® Plastic Envelopes with Button and String Tie Closure, Legal Booklet, 9.75 x 14.5, Yellow, 12/Pack (219B1YE)~#|#~m004858015_sc7JAM Paper® Plastic Envelopes with Button and String Tie Closure, Legal Booklet, 9.75 x 14.5, Yellow, 12/Pack (219B1YE)~#|#~m004857849_sc7
Item: 262999
Model: 219B1YE
No reviews yet
Price is $40.99
Unit of measure 12/Pack Price per unit $3.42/Envelope
Free delivery by Fri, May 16
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JAM PAPER A9 Invitation Envelopes, 5 3/4" x 8 3/4", White, 50/Pack (31911140I)~#|#~m007159209_sc7JAM PAPER A9 Invitation Envelopes, 5 3/4" x 8 3/4", White, 50/Pack (31911140I)~#|#~m007159208_sc7
Item: 1588723
Model: 31911140I
Price is $33.19
Unit of measure 50/Pack
Delivery by Fri, May 16
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JAM Paper® Plastic Envelopes with Button and String Tie Closure, #10 Business Booklet, 5.25 x 10, Lime Green, 12/Pack (921B1LI)~#|#~m004857990_sc7JAM Paper® Plastic Envelopes with Button and String Tie Closure, #10 Business Booklet, 5.25 x 10, Lime Green, 12/Pack (921B1LI)~#|#~m004857824_sc7
Item: 235328
Model: 921B1LI
No reviews yet
Price is $26.49
Unit of measure 12/Pack Price per unit $2.21/Envelope
Delivery by Fri, May 16
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Midnight Black, 250/BX~#|#~m004940475_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Midnight Black, 250/BX~#|#~m005824009_sc7
Item: 387486
Model: F-4560-B-250
Price is $74.99
Unit of measure 250/Box
Free delivery by Tue, May 20
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Quality Park Kraft Self Seal Document Envelopes, 9 3/4" x 12 1/2", White, 25/Box (64015)~#|#~sp44852729_sc7Quality Park Kraft Self Seal Document Envelopes, 9 3/4" x 12 1/2", White, 25/Box (64015)~#|#~sp44852727_sc7
Item: 2598542
Model: QUA64015
No reviews yet
Price is $53.59
Unit of measure 25/Box
Free delivery by Mon, May 12
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LUX 9" x 12" Open End Window Envelopes, Limelight Green~#|#~m001406666_sc7
Item: 1277745
Model: LUX-1590-101-50
No reviews yet
Price is $53.99
Unit of measure 50/Pack
Free delivery by Tue, May 20
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 500/Box, Grocery Bag (4865-GB-500)~#|#~m000081708_sc7
Item: 515430
Model: 4865-GB-500
No reviews yet
Price is $87.89
Free delivery by Tue, May 20
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LUX Peel & Press A7 Invitation Envelopes, 5.25" x 7.25", Anthracite Metallic, 50/Box (5380-15-50)~#|#~sp91486390_sc7LUX Peel & Press A7 Invitation Envelopes, 5.25" x 7.25", Anthracite Metallic, 50/Box (5380-15-50)~#|#~sp91486313_sc7
Item: 282727
Model: 5380-15-50
Price is $19.90
Unit of measure 50/Pack
Delivery by Tue, May 20
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JAM Paper Gummed A7 Invitation Envelopes, 5 1/4" x 7 1/4", White, 1000/Carton (73767B)~#|#~sp70241006_sc7JAM Paper Gummed A7 Invitation Envelopes, 5 1/4" x 7 1/4", White, 1000/Carton (73767B)~#|#~sp70241005_sc7
Item: 366239
Model: 73767B
Price is $130.79
Unit of measure 1000/Pack
Free delivery by Fri, May 16
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 250/Box, White - 100% Recycled (4872-WPC-250)~#|#~m000211234_sc7
Item: 516196
Model: 4872-WPC-250
No reviews yet
Price is $50.39
Free delivery by Tue, May 20
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Over 30
LUX 5 1/2 x 5 1/2 Square Envelopes, 50/Box, Avocado (EX8515-27-50)~#|#~m000081470_sc7
Item: 282101
Model: EX8515-27-50
No reviews yet
Price is $20.16
Unit of measure 50/Pack
Delivery by Tue, May 20
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Over 30
Quality Park Redi-Seal Kraft Catalog Envelope, 12" x 15 1/2", Kraft, 250/Box (44062)~#|#~s0171359_sc7
Item: 377347
Model: QUA44062
No reviews yet
Price is $173.49
Unit of measure 250/Box
Free delivery by Wed, May 14
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Over 30
LUX 60lbs. 4 1/8" x 9 1/2" #10 Business Envelopes, White With Silver LUX Lining, 1000/BX~#|#~m000081264_sc7
Item: 388426
Model: FLWH4260-03-100
No reviews yet
Price is $202.19
Unit of measure 1000/Box
Free delivery by Tue, May 20
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 500/Box, 24lb. White~#|#~m004064012_sc7
Item: 2146365
Model: 51867-MI-500
Price is $98.29
Unit of measure 500/Pack
Free delivery by Tue, May 20
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JAM Paper® 3.125 x 3.125 Mini Square Invitation Envelopes, Black Linen, 50/Pack (V01200I)~#|#~sp29740581_sc7JAM Paper® 3.125 x 3.125 Mini Square Invitation Envelopes, Black Linen, 50/Pack (V01200I)~#|#~sp29740580_sc7
Item: 24364913
Model: V01200I
No reviews yet
Price is $36.79
Unit of measure 50/Pack
Free delivery by Fri, May 16
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LUX A2 (4 3/8 x 5 3/4) 1000/Box, White - 100% Recycled (4870-WPC-1000)~#|#~m000161358_sc7
Item: 384755
Model: 4870-WPC-1000
Price is $180.99
Unit of measure 1000/Box
Free delivery by Tue, May 20
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Quality Park Durable Kraft Catalog Envelopes, 9" x 12", 250/Ct~#|#~s0690388_sc7
Item: QUA41420
Model: QUA41420
No reviews yet
Price is $136.19
Unit of measure 250/Carton
Free delivery by Mon, May 12
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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.