LUX 70 lb 5 3/4" x 8 3/4" A9 Vellum Envelopes, Bright White, 50/Pack~#|#~m000082145_sc7
Item: 1028606
Model: 4895-70W-50
Price is $16.19
Delivery by Wed, Dec 17
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JAM Paper A6 Foil Lined Invitation Envelopes, 4.75 x 6.5, White with Silver Foil, 25/Pack (82927)~#|#~m004671873_sc7JAM Paper A6 Foil Lined Invitation Envelopes, 4.75 x 6.5, White with Silver Foil, 25/Pack (82927)~#|#~m004671872_sc7
Item: 262755
Model: 82927
No reviews yet
Price is $14.29
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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JAM Paper 9 x 12 Booklet Envelopes, Dark Purple, 25/Pack (572312532)~#|#~sp112110402_sc7JAM Paper 9 x 12 Booklet Envelopes, Dark Purple, 25/Pack (572312532)~#|#~sp112110401_sc7
Item: 261635
Model: 572312532
Price is $26.09
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 25/Pack (15859)~#|#~sp111772364_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Yellow, 25/Pack (15859)~#|#~sp111772363_sc7
Item: 260986
Model: 15859
Price is $10.29
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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JAM Paper A2 Strathmore Invitation Envelopes, 4.375 x 5.75, Bright White Linen, 25/Pack (66670)~#|#~m007159143_sc7JAM Paper A2 Strathmore Invitation Envelopes, 4.375 x 5.75, Bright White Linen, 25/Pack (66670)~#|#~m007159142_sc7
Item: 262488
Model: 66670
Price is $11.49
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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JAM Paper A6 Translucent Vellum Invitation Envelopes, 4.75 x 6.5, Clear, 50/Pack (13756I)~#|#~sp123308053_sc7JAM Paper A6 Translucent Vellum Invitation Envelopes, 4.75 x 6.5, Clear, 50/Pack (13756I)~#|#~sp123308052_sc7
Item: 1588873
Model: 13756I
No reviews yet
Price is $34.29
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Pack, Champagne Metallic (5365-M08-50)~#|#~sp14807905_sc7
Item: 24261149
Model: 5365-M08-50
Price is $14.29
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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JAM Paper 2.375 x 2.375 Mini Square Envelopes, White, 100/Pack (203642A)~#|#~sp121512214_sc7JAM Paper 2.375 x 2.375 Mini Square Envelopes, White, 100/Pack (203642A)~#|#~sp121512213_sc7
Item: 1227806
Model: 203642A
No reviews yet
Price is $27.99
Unit of measure 100/Pack
Delivery by Mon, Dec 15
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Quality Park Tyvek Open End Envelope, 12" x 16" x 2", White, 100/Carton (QUAR4290)~#|#~s0171536_sc7
Item: 827951
Model: QUAR4290
Price is $396.09
Unit of measure 100/Carton
Free delivery by Wed, Dec 17
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JAM Paper Self Seal Invitation Envelope 8 1/2" x 8 1/2", Natural, 50/Pack (8575-03-50)~#|#~449EB9A2-1512-4D5F-84502DA81A1305D5_sc7JAM Paper Self Seal Invitation Envelope 8 1/2" x 8 1/2", Natural, 50/Pack (8575-03-50)~#|#~525B2C2B-E135-4444-9D626E99B55C5509_sc7
Item: 24604535
Model: 8575-03-50
No reviews yet
Price is $17.39
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Natural Linen (4880-NLI-250)~#|#~m005902296_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Natural Linen (4880-NLI-250)~#|#~m000082051_sc7
Item: 516139
Model: 4880-NLI-250
No reviews yet
Price is $56.99
Free delivery by Wed, Dec 17
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JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Yellow Recycled, Bulk 500/Box (356730557H)~#|#~m003757860_sc7JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Yellow Recycled, Bulk 500/Box (356730557H)~#|#~m003562845_sc7
Item: 2103381
Model: 356730557H
No reviews yet
Price is $159.89
Unit of measure 500/Box
Free delivery by Mon, Dec 15
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JAM Paper 6 x 6 Square Invitation Envelopes, Dark Purple, 25/Pack (563912522)~#|#~m003905005_sc7JAM Paper 6 x 6 Square Invitation Envelopes, Dark Purple, 25/Pack (563912522)~#|#~m003905004_sc7
Item: 261630
Model: 563912522
No reviews yet
Price is $35.59
Unit of measure 25/Pack
Free delivery by Mon, Dec 15
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LUX #10 All Purpose Window EnvelopesEnvelopes(4 1/8 x 9 1/2) 250/Pack, 80lb. Navy (LUX-10APW103250)~#|#~sp5822112_sc7LUX #10 All Purpose Window EnvelopesEnvelopes(4 1/8 x 9 1/2) 250/Pack, 80lb. Navy (LUX-10APW103250)~#|#~sp5875507_sc7
Item: 23995467
Model: LUX-10APW103250
No reviews yet
Price is $81.59
Unit of measure 250/Pack
Free delivery by Wed, Dec 17
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LUX 5 x 5 Square Envelopes, 50/Box, Wisteria (LUX-8505-106-50)~#|#~m000081537_sc7
Item: 282171
Model: LUX-8505-106-50
No reviews yet
Price is $18.89
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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JAM Paper 4Bar A1 Strathmore Invitation Envelopes, 3.625 x 5.125, Natural White Wove, Bulk 250/Box (194891H)~#|#~m007159197_sc7JAM Paper 4Bar A1 Strathmore Invitation Envelopes, 3.625 x 5.125, Natural White Wove, Bulk 250/Box (194891H)~#|#~m007159196_sc7
Item: 1589359
Model: 194891H
No reviews yet
Price is $64.99
Unit of measure 250/Box
Free delivery by Mon, Dec 15
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JAM Paper A7 Metallic Invitation Envelopes, 5.25 x 7.25, Stardream Gold, 25/Pack (GCST708)~#|#~m003905144_sc7JAM Paper A7 Metallic Invitation Envelopes, 5.25 x 7.25, Stardream Gold, 25/Pack (GCST708)~#|#~m003905143_sc7
Item: 261968
Model: GCST708
No reviews yet
Price is $29.89
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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JAM Paper 6 x 6 Square Invitation Envelopes, Burgundy, Bulk 250/Box (36395838H)~#|#~m002934244_sc7JAM Paper 6 x 6 Square Invitation Envelopes, Burgundy, Bulk 250/Box (36395838H)~#|#~m002934243_sc7
Item: 1589762
Model: 36395838H
No reviews yet
Price is $283.99
Unit of measure 250/Box
Free delivery by Mon, Dec 15
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JAM Paper 4Bar A1 Invitation Envelopes, 3.625 x 5.125, Dark Grey, 25/Pack (36396431)~#|#~m004671964_sc7JAM Paper 4Bar A1 Invitation Envelopes, 3.625 x 5.125, Dark Grey, 25/Pack (36396431)~#|#~m004671963_sc7
Item: 261448
Model: 36396431
Price is $9.99
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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LUX 6 1/2 x 6 1/2 Foil Lined Square Envelopes, 250/Box, White w/Red LUX Lining (FLWH8535-01-250)~#|#~m000081599_sc7
Item: 513766
Model: FLWH8535-01-250
No reviews yet
Price is $91.89
Free delivery by Wed, Dec 17
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Lux Double Window Invoice Envelopes Wasabi 4 1/8 x 9 1/2 inch uncheck 50/Pack~#|#~m002084679_sc7
Item: 1559060
Model: INVDW-L22-50
No reviews yet
Price is $45.49
Free delivery by Wed, Dec 17
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Wisteria Purple, 250/BX~#|#~m000081288_sc7
Item: 388708
Model: LUX-7716-106-25
No reviews yet
Price is $125.49
Unit of measure 250/Box
Free delivery by Wed, Dec 17
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LUX #10 Full Face Window Envelopes (4 1/8 x 9 1/2) 250/Pack, 80lb. White (FFW-10-80W-250)~#|#~sp12274947_sc7LUX #10 Full Face Window Envelopes (4 1/8 x 9 1/2) 250/Pack, 80lb. White (FFW-10-80W-250)~#|#~sp12275015_sc7
Item: 24161910
Model: FFW-10-80W-250
Price is $125.19
Unit of measure 250/Pack
Free delivery by Wed, Dec 17
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JAM Paper #10 Business Foil Envelopes with Peel & Seal Closure, 4 1/8" x 9 1/2", Silver, 25/Pack (1323306)~#|#~m004671920_sc7JAM Paper #10 Business Foil Envelopes with Peel & Seal Closure, 4 1/8" x 9 1/2", Silver, 25/Pack (1323306)~#|#~m004671919_sc7
Item: 260896
Model: 1323306
No reviews yet
Price is $41.89
Unit of measure 25/Pack
Free delivery by Mon, Dec 15
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LUX A10 Invitation Envelopes (6 x 9 1/2) 50/Pack, Limelight (LUX-4590-101-50)~#|#~sp12274947_sc7LUX A10 Invitation Envelopes (6 x 9 1/2) 50/Pack, Limelight (LUX-4590-101-50)~#|#~sp14081688_sc7
Item: 24216127
Model: LUX-4590-101-50
No reviews yet
Price is $37.04
Unit of measure 50/Pack
Free delivery by Wed, Dec 17
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LUX 80lb 4 3/8"x5 3/4" A2 RSVP, Invitation Envelopes W/Glue, Aquamarine Metallic, 500/BX~#|#~m000081684_sc7
Item: 515800
Model: 5370-02-500
No reviews yet
Price is $110.89
Free delivery by Wed, Dec 17
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Midnight Black, 1000/BX~#|#~m004940475_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Midnight Black, 1000/BX~#|#~m005824009_sc7
Item: 387484
Model: F-4560-B-1000
No reviews yet
Price is $211.49
Unit of measure 1000/Box
Free delivery by Wed, Dec 17
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Garnet (EX4865-26-50)~#|#~m000081704_sc7
Item: 282366
Model: EX4865-26-50
No reviews yet
Price is $16.89
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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JAM Paper #10 Business Foil Envelopes with Peel & Seal Closure, 4 1/8" x 9 1/2", Black, 100/Pack (01327704B)~#|#~sp137085716_sc7
Item: 260952
Model: 01327704B
No reviews yet
Price is $137.79
Unit of measure 100/Box
Free delivery by Mon, Dec 15
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LUX Open End Open End Window Envelope, 9" x 12", Pool Blue, 250/Pack (LUX1590102-250)~#|#~m001406667_sc7
Item: 1277762
Model: LUX1590102-250
No reviews yet
Price is $111.67
Unit of measure 250/Box
Free delivery by Wed, Dec 17
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LUX A8 Invitation Envelopes (5 1/2 x 8 1/8) 50/Box, Clear Translucent (4885-00-50)~#|#~m000082127_sc7
Item: 282879
Model: 4885-00-50
No reviews yet
Price is $34.79
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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LUX Self Seal Invitation Envelope 7" x 7", Pool Blue, 250/Box (LUX-8545-102-25)~#|#~m000081637_sc7
Item: 388747
Model: LUX-8545-102-25
No reviews yet
Price is $86.89
Unit of measure 250/Box
Free delivery by Wed, Dec 17
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Over 30
JAM Paper A2 Colored Invitation Envelopes, 4.375 x 5.75, Green Recycled, Bulk 250/Box (15843H)~#|#~sp121512016_sc7JAM Paper A2 Colored Invitation Envelopes, 4.375 x 5.75, Green Recycled, Bulk 250/Box (15843H)~#|#~sp121512015_sc7
Item: 1589290
Model: 15843H
Price is $86.89
Unit of measure 250/Box
Free delivery by Mon, Dec 15
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80 lb 6 1/4" x 6 1/4" Peel & Press Square Envelopes, Midnight Black, 50/Pack~#|#~m001149685_sc7
Item: 1030064
Model: LUX-8530-B-50
No reviews yet
Price is $40.39
Free delivery by Wed, Dec 17
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LUX 70lb 7 1/4"x5 1/4" Square Flap Postage Saver Envelopes, Bright White, 1000/BX~#|#~m000081518_sc7LUX 70lb 7 1/4"x5 1/4" Square Flap Postage Saver Envelopes, Bright White, 1000/BX~#|#~43964C72-4044-4051-8F8454F3C85A2194_sc7
Item: 515383
Model: 55PS-W-1000
No reviews yet
Price is $189.69
Free delivery by Wed, Dec 17
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Over 30
JAM Paper Expandable Booklet Envelopes with Peel & Seal Closure, 10 x 12 x 4, White, 250/Box (376634193b)~#|#~sp74203593_sc7JAM Paper Expandable Booklet Envelopes with Peel & Seal Closure, 10 x 12 x 4, White, 250/Box (376634193b)~#|#~sp74203844_sc7
Item: 24295244
Model: 376634193B
No reviews yet
Price is $716.39
Unit of measure 250/Pack
Free delivery by Mon, Dec 15
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LUX Double Window Invoice Envelopes (4 1/8 x 9 1/8) 250/Box, Pool (INVDW-102-250)~#|#~m004063893_sc7
Item: 2147441
Model: INVDW-102-250
No reviews yet
Price is $82.28
Unit of measure 250/Pack
Free delivery by Wed, Dec 17
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JAM Paper 6 x 6 Square Invitation Envelopes, Dark Purple, Bulk 1000/Carton (563912522B)~#|#~m003905005_sc7JAM Paper 6 x 6 Square Invitation Envelopes, Dark Purple, Bulk 1000/Carton (563912522B)~#|#~m003905004_sc7
Item: 261642
Model: 563912522B
No reviews yet
Price is $846.99
Unit of measure 1000/Carton
Free delivery by Mon, Dec 15
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JAM Paper #10 Policy Metallic Envelopes, 4.125 x 9.5, Stardream Silver, Bulk 1000/Carton (900905922B)~#|#~m004672038_sc7JAM Paper #10 Policy Metallic Envelopes, 4.125 x 9.5, Stardream Silver, Bulk 1000/Carton (900905922B)~#|#~m004672037_sc7
Item: 262070
Model: 900905922B
No reviews yet
Price is $677.99
Unit of measure 1000/Carton
Free delivery by Mon, Dec 15
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Pack, Champagne Metallic (5380-M08-50)~#|#~sp14807641_sc7
LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Pack, Champagne Metallic (5380-M08-50) is Out of stock
Item: 24260940
Model: 5380-M08-50
Price is $26.09
Unit of measure 50/Pack
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.