JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 50/Pack (900926651I)~#|#~sp132864269_sc7JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural, 50/Pack (900926651I)~#|#~sp132864268_sc7
Item: 1588594
Model: 900926651I
Price is $20.49
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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LUX #7 Coin Envelopes (3 1/2 x 6 1/2) 250/Pack, Limelight (LUX-7CO-101-250)~#|#~sp14807797_sc7
Item: 24260385
Model: LUX-7CO-101-250
No reviews yet
Price is $40.89
Unit of measure 250/Pack
Free delivery by Wed, Dec 17
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Pastel Green (SH4280-04-50)~#|#~m000082065_sc7
Item: 282808
Model: SH4280-04-50
Price is $14.29
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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LUX Security Tinted #10 Window Envelope, 4 1/2" x 9 1/2", White, 1000/Pack (WS-3133-1M)~#|#~m004064002_sc7
Item: 2146617
Model: WS-3133-1M
No reviews yet
Price is $169.69
Unit of measure 1000/Pack
Free delivery by Wed, Dec 17
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JAM Paper Self Seal #7 Coin Business Envelopes, 3 1/2" x 6 1/2", White, 50/Pack (356838558I)~#|#~2622FE63-FAFA-40B8-8A3E7FE698FDFC36_sc7
Item: 24557982
Model: 356838558I
No reviews yet
Price is $16.19
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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JAM Paper Cellophane Envelope with Peel & Seal Closure, A6, 4.9375 x 6.5625, Clear, 100/Pack (A6CELLO)~#|#~m000068416_sc7
Item: 262894
Model: A6CELLO
Price is $35.69
Unit of measure 100/Pack
Free delivery by Mon, Dec 15
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JAM Paper #7 Coin Tear-Proof Tyvek Open End Envelopes, 3.5 x 6.5, White, 50/Pack (2131076C)~#|#~m004542906_sc7JAM Paper #7 Coin Tear-Proof Tyvek Open End Envelopes, 3.5 x 6.5, White, 50/Pack (2131076C)~#|#~m004542905_sc7
Item: 2329340
Model: 2131076C
Price is $27.19
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 50/Pack, 60lb. White w/Peel & Press (4872-WPP-50)~#|#~sp14807639_sc7
Item: 24260946
Model: 4872-WPP-50
No reviews yet
Price is $19.29
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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Staples Self Seal Kraft Catalog Envelopes, 7.5"L x 10.5"H, Brown, 100/Box (534792/17105)~#|#~A86B21ED-0896-4E39-BB663E073DE71C05_sc7Staples Self Seal Kraft Catalog Envelopes, 7.5"L x 10.5"H, Brown, 100/Box (534792/17105)~#|#~0BC76007-45FC-4109-B59DF3B452E69A09_sc7
Item: 534792
Model: ST534792-CC
Price is $34.59
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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LUX A7 Gatefold Invitation (5 x 7) 50/Pack, Navy (LUXA7GF-103-50)~#|#~sp14807818_sc7
Item: 24260414
Model: LUXA7GF-103-50
No reviews yet
Price is $32.59
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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JAM Paper Self Seal #3 Coin Business Envelopes, 2 1/2" x 4 1/4", White, 50/Pack (356838553I)~#|#~ADCB4601-DA69-40B5-B4A57D375FC45713_sc7
Item: 24557932
Model: 356838553I
No reviews yet
Price is $17.09
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, Crystal Metallic  (5365-30-50)~#|#~sp14807674_sc7
Item: 24260900
Model: 5365-30-50
No reviews yet
Price is $14.95
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 50 Pack (4860-SG-50)~#|#~sp226423802_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 50 Pack (4860-SG-50)~#|#~sp226423801_sc7
Item: 24578396
Model: 4860-SG-50
No reviews yet
Price is $25.49
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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Over 30
JAM Paper A7 Invitation Envelopes, 5.25 x 7.25, Dark Grey, 50/Pack (36396434I)~#|#~sp132864443_sc7JAM Paper A7 Invitation Envelopes, 5.25 x 7.25, Dark Grey, 50/Pack (36396434I)~#|#~sp132864442_sc7
Item: 1589163
Model: 36396434I
No reviews yet
Price is $18.99
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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LUX 9" x 12" Open End Envelopes 50/Pack, Limelight (LUX-4894-101-50)~#|#~3A9FAD67-18F3-494A-A8AAE57F40212199_sc7
Item: 24260460
Model: LUX-4894-101-50
No reviews yet
Price is $38.69
Unit of measure 50/Pack
Free delivery by Wed, Dec 17
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Limelight (LUX-4872-101-50)~#|#~m000081861_sc7
Item: 282549
Model: LUX-4872-101-50
Price is $13.95
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Natural Linen (4880-NLI-50)~#|#~m005902296_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Natural Linen (4880-NLI-50)~#|#~m005823962_sc7
Item: 282792
Model: 4880-NLI-50
Price is $27.89
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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LUX 28lbs. 13" x 17" Kraft Open End Flap Jumbo Envelopes, Brown Kraft, 500/BX (85739-500)~#|#~2938DAEE-C86F-43DC-AFC0A11848D32858_sc7
Item: 385900
Model: 85739-500
No reviews yet
Price is $442.39
Unit of measure 500/Box
Free delivery by Wed, Dec 17
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JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Blue Recycled, 25/Pack (356730549)~#|#~m003757871_sc7JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Blue Recycled, 25/Pack (356730549)~#|#~m003562857_sc7
Item: 2103445
Model: 356730549
No reviews yet
Price is $11.49
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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Over 30
LUX A7 Invitation Envelopes, 5-1/4" x 7-1/4", 250/Pack, Holiday Leaves on Ruby Red (LUX488018G250)~#|#~sp20150746_sc7
Item: 24294029
Model: LUX488018G250
Price is $57.79
Unit of measure 250/Pack
Free delivery by Wed, Dec 17
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LUX 8 1/2 x 10 1/2 Open End Envelopes 50/Pack, Midnight Black (4892-B-50)~#|#~sp14807548_sc7
Item: 24260335
Model: 4892-B-50
No reviews yet
Price is $36.69
Unit of measure 50/Pack
Free delivery by Wed, Dec 17
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LUX A10 Invitation Envelopes (6 x 9 1/2) 50/Box, Pool (LUX-4590-102-50)~#|#~m004063936_sc7
Item: 2147206
Model: LUX-4590-102-50
No reviews yet
Price is $16.09
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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Over 30
LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Pack, Aquamarine Metallic (5375-02-50)~#|#~sp14807924_sc7
Item: 24260277
Model: 5375-02-50
No reviews yet
Price is $15.49
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Gold, 25/Pack (1323305)~#|#~sp137086460_sc7JAM Paper #10 Business Foil Envelopes with Self-Adhesive Closure, 4.125 x 9.5, Gold, 25/Pack (1323305)~#|#~sp137086019_sc7
Item: 260895
Model: 1323305
No reviews yet
Price is $42.89
Unit of measure 25/Pack
Free delivery by Mon, Dec 15
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LUX 5 1/4 x 5 1/4 Square Envelopes 50/Pack, Grocery Bag (8510-GB-50)~#|#~sp14807955_sc7
Item: 24261013
Model: 8510-GB-50
No reviews yet
Price is $19.09
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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70 lb 4" x 4" Peel & Press Square Envelopes, Grocery Bag Brown, 50/Pack~#|#~m001149704_sc7
Item: 1030021
Model: 8504-GB-50
No reviews yet
Price is $19.89
Delivery by Wed, Dec 17
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Over 30
LUX 10 x 15 Open End Envelopes 50/Pack, 28lb. Bright White (4162-50)~#|#~sp14807520_sc7
Item: 24260236
Model: 4162-50
No reviews yet
Price is $39.69
Unit of measure 50/Pack
Free delivery by Wed, Dec 17
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Over 30
JAM Paper 4.5 x 4.5 Square Invitation Envelopes, White, 50/Pack (439911145I)~#|#~sp113368812_sc7JAM Paper 4.5 x 4.5 Square Invitation Envelopes, White, 50/Pack (439911145I)~#|#~sp113368811_sc7
Item: 1588514
Model: 439911145I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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LUX A2 (4 3/8 x 5 3/4) 50/Box, Holiday Red (FE4270-15-50)~#|#~m000081790_sc7
Item: 282463
Model: FE4270-15-50
No reviews yet
Price is $20.59
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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Over 30
Staples Gummed Kraft Catalog Envelopes, 7.5"L x 10.5"H, Brown, 100/Box (534719/17095)~#|#~s1225277_sc7Staples Gummed Kraft Catalog Envelopes, 7.5"L x 10.5"H, Brown, 100/Box (534719/17095)~#|#~s1225276_sc7
Item: 534719
Model: ST534719-CC
Price is $31.69
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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Over 30
JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Violet Purple Recycled, 25/Pack (80278)~#|#~m003904638_sc7JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Violet Purple Recycled, 25/Pack (80278)~#|#~m003904637_sc7
Item: 261110
Model: 80278
Price is $10.99
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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Over 30
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
Price is $54.99
Unit of measure 25/Box
Free Next-Day eligible by tomorrow
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Over 30
LUX #10 Full Face Window Envelopes (4 1/8 x 9 1/2) 50/Pack, 28lb. Bright White (FFW-10-50)~#|#~sp14807466_sc7
Item: 24260466
Model: FFW-10-50
No reviews yet
Price is $21.59
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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Over 30
LUX Self Seal #5 1/2 Coin Envelopes, 3 1/8" x 5 1/2", Navy, 50/Pack (LUX512CO10350)~#|#~sp14807610_sc7
Item: 24260977
Model: LUX512CO10350
No reviews yet
Price is $18.49
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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Over 30
LUX A7 Foil Lined Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, White w/Black LUX Lining (FLWH4880-02-50)~#|#~m000082097_sc7
Item: 282844
Model: FLWH4880-02-50
Price is $35.69
Unit of measure 50/Pack
Free delivery by Wed, Dec 17
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Over 30
LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, Holiday Red (FE4275-15-50)~#|#~m000081919_sc7
Item: 282620
Model: FE4275-15-50
No reviews yet
Price is $26.09
Unit of measure 50/Pack
Delivery by Wed, Dec 17
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Over 30
Neenah Paper Self Seal A6 Invitation Envelope, #70, Solar White, 1000/Carton (6660400)~#|#~s1015150_sc7
Item: 2087527
Model: 6660400
No reviews yet
Price is $146.79
Unit of measure 1000/Carton
Free delivery by Fri, Dec 19
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Over 30
JAM Paper #7 Coin Business Colored Envelopes, 3.5 x 6.5, Ultra Fuchsia Pink, 50/Pack (1526767I)~#|#~m003184166_sc7
Item: 2329339
Model: 1526767I
Price is $20.39
Unit of measure 50/Pack
Delivery by Mon, Dec 15
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Over 30
JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Red, 25/Pack (67161)~#|#~sp112110506_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Red, 25/Pack (67161)~#|#~sp112110505_sc7
Item: 260833
Model: 67161
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Dec 15
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Over 30
Ampad Gold Fibre Fastrip Release & Seal White Catalog Envelope, White, 9 x 12, 100/Box (73127)~#|#~m002272576_sc7
Ampad Gold Fibre Fastrip Release & Seal White Catalog Envelope, White, 9 x 12, 100/Box (73127) is Out of stock
Item: 2669191
Model: 73127
Price is $31.79
Unit of measure 100/Box
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.