Sponsored Products
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JAM Paper Self Seal Invitation Envelope, 4 x 4, Gray, 50 Pack (8504-22-50)~#|#~sp226423820_sc7JAM Paper Self Seal Invitation Envelope, 4 x 4, Gray, 50 Pack (8504-22-50)~#|#~sp226423819_sc7
Item: 24578472
Model: 8504-22-50
No reviews yet
Price is $16.29
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Taupe Metallic (5380-M09-1M)~#|#~m005902320_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Taupe Metallic (5380-M09-1M)~#|#~m005823888_sc7
Item: 2146113
Model: 5380-M09-1M
No reviews yet
Price is $280.98
Unit of measure 1000/Pack
Free delivery by Wed, Feb 18
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JAM Paper 5.5 x 5.5 Square Invitation Envelopes, Presidential Blue, 25/Pack (263917212)~#|#~sp4808476_sc7JAM Paper 5.5 x 5.5 Square Invitation Envelopes, Presidential Blue, 25/Pack (263917212)~#|#~sp4808475_sc7
Item: 2633101
Model: 263917212
No reviews yet
Price is $35.59
Unit of measure 25/Pack
Free delivery by Mon, Feb 16
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 1000/Box, Silver Metallic (5375-06-1000)~#|#~m000081736_sc7
Item: 385199
Model: 5375-06-1000
No reviews yet
Price is $211.59
Unit of measure 1000/Box
Free delivery by Wed, Feb 18
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LUX 7 1/2 x 7 1/2 Square Envelopes, 250/Box, Silver Metallic (8555-06-250)~#|#~m004063768_sc7
Item: 2146109
Model: 8555-06-250
No reviews yet
Price is $125.00
Unit of measure 250/Pack
Free delivery by Wed, Feb 18
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JAM Paper Self Seal #6 Coin Business Envelopes, 3 3/8" x 6", White, 50/Pack (356838557I)~#|#~15A7B429-AAAF-46EC-84149C411E76B846_sc7
Item: 24557865
Model: 356838557I
No reviews yet
Price is $15.39
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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LUX Open End Moistenable Glue #13 Catalog Envelope, 10" x 13", Red, 500/Box (FE-7300-15-500)~#|#~m000081429_sc7
Item: 387817
Model: FE-7300-15-500
Price is $355.99
Unit of measure 500/Box
Free delivery by Wed, Feb 18
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JAM Paper 6.125 x 9.5 Booklet Foil Envelopes with  Peel & Seal Closure, Black, 100/Pack (01323282B)~#|#~sp137085714_sc7
Item: 260959
Model: 01323282B
No reviews yet
Price is $127.99
Unit of measure 100/Box
Free delivery by Mon, Feb 16
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JAM Paper Kraft A7 Invitation Envelopes, 5.25 x 7.25, Brown Kraft Paper Bag, Bulk 250/Box (LEKR700H)~#|#~m004672451_sc7JAM Paper Kraft A7 Invitation Envelopes, 5.25 x 7.25, Brown Kraft Paper Bag, Bulk 250/Box (LEKR700H)~#|#~m004672450_sc7
Item: 1590174
Model: LEKR700H
No reviews yet
Price is $89.49
Unit of measure 250/Box
Free delivery by Mon, Feb 16
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JAM Paper Square Envelopes, Peel & Press, 6 1/4 x 6 1/4, 70lb, Avocado Green, 50 Pack (8530-102-50)~#|#~sp228873506_sc7
Item: 24578451
Model: 8530-102-50
No reviews yet
Price is $17.49
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Primary Blue, Bulk 250/Box (PACV527H)~#|#~m006965545_sc7JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Primary Blue, Bulk 250/Box (PACV527H)~#|#~m006965544_sc7
Item: 1589793
Model: PACV527H
No reviews yet
Price is $283.99
Unit of measure 250/Box
Free delivery by Mon, Feb 16
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LUX 6 x 6 Square Envelopes 250/Pack, Citrus (8525-20-250)~#|#~sp14807811_sc7
Item: 24260403
Model: 8525-20-250
No reviews yet
Price is $25.79
Unit of measure 250/Pack
Delivery by Wed, Feb 18
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JAM Paper 10 x 13 Booklet Translucent Vellum Envelopes, Clear, 25/Pack (900840420)~#|#~m006965529_sc7JAM Paper 10 x 13 Booklet Translucent Vellum Envelopes, Clear, 25/Pack (900840420)~#|#~m006965528_sc7
Item: 262138
Model: 900840420
No reviews yet
Price is $38.49
Unit of measure 25/Pack
Free delivery by Mon, Feb 16
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LUX 6 1/2 x 6 1/2 Square Envelopes, 1000/Box, Mandarin (EX8535-11-1000)~#|#~m000081577_sc7
Item: 387316
Model: EX8535-11-1000
No reviews yet
Price is $256.08
Unit of measure 1000/Box
Free delivery by Wed, Feb 18
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LUX Open End Window Envelopes 9" x 12"; Mandarin Orange~#|#~m001406669_sc7
Item: 1277776
Model: LUX-1590-11-500
No reviews yet
Price is $165.93
Unit of measure 500/Box
Free delivery by Wed, Feb 18
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JAM Paper 7 1/2 x 7 1/2 Square Envelopes ,Midnight Black, 500 Pack, Black (F-8555-B-500)~#|#~sp226423848_sc7JAM Paper 7 1/2 x 7 1/2 Square Envelopes ,Midnight Black, 500 Pack, Black (F-8555-B-500)~#|#~sp226423847_sc7
Item: 24578625
Model: F-8555-B-500
No reviews yet
Price is $105.29
Unit of measure 500/Pack
Free delivery by Mon, Feb 16
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JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Lilac Purple, 25/Pack (241332378)~#|#~sp4808511_sc7JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Lilac Purple, 25/Pack (241332378)~#|#~sp4808510_sc7
Item: 2632864
Model: 241332378
No reviews yet
Price is $30.99
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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JAM Paper 5.5 x 5.5 Square Invitation Envelopes, Black Linen, 25/Pack (V01210)~#|#~m003905211_sc7JAM Paper 5.5 x 5.5 Square Invitation Envelopes, Black Linen, 25/Pack (V01210)~#|#~m003905210_sc7
Item: 261575
Model: V01210
No reviews yet
Price is $29.89
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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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, Feb 18
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JAM Paper Square Envelopes, Peel & Press, 3 1/4 x 3 1/4, Sunflower Yellow, 50 Pack (8503-84-50)~#|#~sp228873501_sc7
Item: 24578415
Model: 8503-84-50
No reviews yet
Price is $16.29
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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LUX #1 Coin Envelopes (2 1/4 x 3 1/2) 250/Box, Teal (LUX-1CO-25-250)~#|#~m001149689_sc7
Item: 1029940
Model: LUX-1CO-25-250
No reviews yet
Price is $101.39
Free delivery by Wed, Feb 18
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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, Feb 18
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LUX Self Seal Booklet Envelope, 6" x 9", Holiday Red, 50/Pack (FE-4220-15-50)~#|#~sp14807431_sc7
Item: 24260340
Model: FE-4220-15-50
No reviews yet
Price is $25.79
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Blue Recycled, 100/Pack (356730559B)~#|#~sp132864607_sc7JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Blue Recycled, 100/Pack (356730559B)~#|#~sp132864606_sc7
Item: 2103393
Model: 356730559B
No reviews yet
Price is $37.19
Unit of measure 100/Pack
Free delivery by Mon, Feb 16
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LUX 5 3/4" x 8 3/4" 60lbs. Square Flap Envelopes W/Peel & Press, White/Black LUX Lining~#|#~m000082189_sc7
Item: 282955
Model: FLWH4895-02-50
No reviews yet
Price is $44.09
Unit of measure 50/Pack
Free delivery by Wed, Feb 18
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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, Feb 18
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JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Blue Recycled, Bulk 1000/Carton (54093B)~#|#~m003904598_sc7JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Blue Recycled, Bulk 1000/Carton (54093B)~#|#~m003904597_sc7
Item: 261260
Model: 54093B
No reviews yet
Price is $248.79
Unit of measure 1000/Carton
Free delivery by Mon, Feb 16
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LUX A8 Invitation Envelopes (5 1/2 x 8 1/8) 50/Pack, Gold Metallic (4885-07-50)~#|#~sp12274947_sc7LUX A8 Invitation Envelopes (5 1/2 x 8 1/8) 50/Pack, Gold Metallic (4885-07-50)~#|#~sp12275045_sc7
Item: 24161719
Model: 4885-07-50
No reviews yet
Price is $41.59
Unit of measure 50/Pack
Free delivery by Wed, Feb 18
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JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Yellow Recycled, 50/Pack (96326I)~#|#~m003904698_sc7JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Yellow Recycled, 50/Pack (96326I)~#|#~m003904697_sc7
Item: 1589524
Model: 96326I
Price is $20.49
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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JAM Paper Square Envelopes, Peel & Press, 100lb Citrus Yellow, 6 1/4 x 6 1/4, 50 Pack, (8530-L20-50)~#|#~sp228873553_sc7
Item: 24578542
Model: 8530-L20-50
No reviews yet
Price is $18.89
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Yellow Recycled, 50/Pack (356730557i)~#|#~sp4211537_sc7JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Yellow Recycled, 50/Pack (356730557i)~#|#~sp4211536_sc7
Item: 2478022
Model: 356730557I
No reviews yet
Price is $19.39
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Teal, Bulk 250/Box (157462H)~#|#~m003904714_sc7JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Teal, Bulk 250/Box (157462H)~#|#~m003904713_sc7
Item: 1590205
Model: 157462H
No reviews yet
Price is $77.99
Unit of measure 250/Box
Free delivery by Mon, Feb 16
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 25/Pack (900926651)~#|#~sp134498373_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 25/Pack (900926651)~#|#~sp134498372_sc7
Item: 261878
Model: 900926651
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX A2 (4 3/8 x 5 3/4) 1000/Box, White Linen (4870-WLI-1000)~#|#~m000161359_sc7
Item: 384749
Model: 4870-WLI-1000
Price is $119.79
Unit of measure 1000/Box
Free delivery by Wed, Feb 18
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, Anthracite Metallic (5375-15-50)~#|#~m000081893_sc7
LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, Anthracite Metallic (5375-15-50) is Out of stock
Item: 282585
Model: 5375-15-50
No reviews yet
Price is $22.95
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.