Sponsored Products
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LUX 6" x 9" Kraft Open End Envelopes, 500/Box, 80lb. White (1644-32IJ-500)~#|#~4F04E5CE-1D70-4C96-9698E869D2EE1DD2_sc7LUX 6" x 9" Kraft Open End Envelopes, 500/Box, 80lb. White (1644-32IJ-500)~#|#~3B20542A-BEBF-4B83-A7746046FCF64462_sc7
Item: 2146230
Model: 1644-32IJ-500
No reviews yet
Price is $171.19
Unit of measure 500/Pack
Free delivery by Fri, Dec 26
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LUX A7 Foil Lined Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Black w/Gold LUX Lining (FLBK4880-04-250)~#|#~m000082007_sc7
Item: 387865
Model: FLBK4880-04-250
Price is $168.59
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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LUX A2 Envelope - 24lb. White) 1000/Box, Machine Insertable 1000/Box~#|#~m004064012_sc7
Item: 2146360
Model: 80132-MI-1M
No reviews yet
Price is $125.99
Unit of measure 1000/Pack
Free delivery by Fri, Dec 26
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JAM Paper Expandable Open End Catalog Envelopes with Peel & Seal Closure, 9 x 12 x 2, White, 250/Box (376634177b)~#|#~sp74203583_sc7JAM Paper Expandable Open End Catalog Envelopes with Peel & Seal Closure, 9 x 12 x 2, White, 250/Box (376634177b)~#|#~sp74203889_sc7
Item: 24295253
Model: 376634177B
No reviews yet
Price is $557.99
Unit of measure 250/Pack
Free delivery by Tue, Dec 23
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LUX A6 Foil Lined Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, White w/Gold LUX Lining (FLWH4875-04-50)~#|#~m000081967_sc7
Item: 282679
Model: FLWH4875-04-50
No reviews yet
Price is $16.19
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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LUX 80lbs. 4 3/8" x 5 3/4" A2 RSVP, Invitation Envelopes W/Peel & Press, Wisteria Purple, 250/BX~#|#~m000081844_sc7
Item: 388588
Model: LUX-4870-106-25
No reviews yet
Price is $68.09
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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JAM Paper Self Seal #1 Coin Business Envelopes, 2 1/4" x 3 1/2", White, 100/Pack (356838552D)~#|#~6E6034D0-FFF9-43C6-805BFA77B6CDA080_sc7
Item: 24557931
Model: 356838552D
No reviews yet
Price is $31.69
Unit of measure 100/Pack
Delivery by Tue, Dec 23
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 1000/BX (7535-1000)~#|#~DB7F205D-9E6A-46E0-8491E1C84AEFDB14_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 1000/BX (7535-1000)~#|#~22EEA5ED-E9AD-40AE-B3AF07777DC2DF1A_sc7
Item: 385671
Model: 7535-1000
No reviews yet
Price is $215.59
Unit of measure 1000/Box
Free delivery by Fri, Dec 26
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LUX Moistenable Glue #10 Window Envelope, 4 1/2" x 9 1/2", Electric Yellow, 50/Pack (4261-20-50)~#|#~m000081284_sc7
Item: 281895
Model: EX7716-12-50
Price is $72.99
Unit of measure 50/Pack
Free delivery by Fri, Dec 26
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Aqua Blue, 25/Pack (1523976)~#|#~m002934481_sc7JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Aqua Blue, 25/Pack (1523976)~#|#~m003904752_sc7
Item: 364291
Model: 1523976
No reviews yet
Price is $20.49
Unit of measure 25/Pack
Delivery by Tue, Dec 23
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LUX Jumbo Kraft Open End Flap Envelopes, 13" x 17", Brown Kraft, 250/Box (85739-250)~#|#~DA58C01A-96CF-4CB9-85FDBC09945C04E4_sc7
Item: 385899
Model: 85739-250
No reviews yet
Price is $258.99
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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LUX 9" x 12" Open End Window Envelopes, Grocery Bag Brown~#|#~m001406663_sc7
Item: 1277766
Model: 1590-GB-250
Price is $169.59
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Silver w/Black LUX Lining (FLSL4872-02-50)~#|#~m004940484_sc7LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Silver w/Black LUX Lining (FLSL4872-02-50)~#|#~m005823925_sc7
Item: 282563
Model: FLSL4872-02-50
No reviews yet
Price is $32.59
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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LUX A2 (4 3/8 x 5 3/4) 50/Box, Vintage Plum (LUX-4870-104-50)~#|#~m000081836_sc7
Item: 282520
Model: LUX-4870-104-50
No reviews yet
Price is $16.19
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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LUX #10 All Purpose Window (4 1/8 x 9 1/2) 250/Box, 24lb. White w/ Sec Tint (WS-3133-250)~#|#~m004064002_sc7
Item: 2146680
Model: WS-3133-250
No reviews yet
Price is $72.79
Unit of measure 250/Pack
Free delivery by Fri, Dec 26
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LUX #1 Coin Envelopes (2 1/4 x 3 1/2) 1000/Box, Gold Metallic (1COGLD-1000)~#|#~m001149717_sc7
Item: 1028631
Model: 1COGLD-1000
No reviews yet
Price is $195.99
Free delivery by Fri, Dec 26
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JAM Paper #3 Coin Business Colored Envelopes, 2.5 x 4.25, Red Recycled, 25/Pack (356730541)~#|#~m003757864_sc7JAM Paper #3 Coin Business Colored Envelopes, 2.5 x 4.25, Red Recycled, 25/Pack (356730541)~#|#~m003562843_sc7
Item: 2103489
Model: 356730541
No reviews yet
Price is $11.49
Unit of measure 25/Pack
Delivery by Tue, Dec 23
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Quality Park Self Seal Kraft Catalog Envelope, 9" x 12", Brown, 100/Box (QUA43563)~#|#~m002277550_sc7
Item: 2708508
Model: QUA43563
Price is $48.19
Unit of measure 100/Box
Free delivery by Wed, Dec 17
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JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Orange Recycled, 50/Pack (95666I)~#|#~m003904690_sc7JAM Paper A7 Colored Invitation Envelopes, 5.25 x 7.25, Orange Recycled, 50/Pack (95666I)~#|#~m003904689_sc7
Item: 1589518
Model: 95666I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Tue, Dec 23
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Midnight Black (F-4580-B-250)~#|#~m005902338_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Midnight Black (F-4580-B-250)~#|#~m005823959_sc7
Item: 387519
Model: F-4580-B-250
No reviews yet
Price is $52.95
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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LUX Open End Window Envelopes 9" x 12", Sunflower Yellow~#|#~m001406670_sc7
Item: 1277775
Model: LUX-1590-12-500
No reviews yet
Price is $256.99
Unit of measure 500/Box
Free delivery by Fri, Dec 26
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LUX 6 1/2 x 6 1/2 Square Envelopes, 50/Box, Holiday Red (8535-15-50)~#|#~m000081572_sc7
Item: 282209
Model: 8535-15-50
No reviews yet
Price is $20.59
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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JAM Paper A7 Colored Invitation Envelopes, 5 1/4" x 7 1/4", Violet Purple Recycled, 50/Pack (80278I)~#|#~m003904638_sc7JAM Paper A7 Colored Invitation Envelopes, 5 1/4" x 7 1/4", Violet Purple Recycled, 50/Pack (80278I)~#|#~m003904637_sc7
Item: 1589523
Model: 80278I
Price is $20.49
Unit of measure 50/Pack
Delivery by Tue, Dec 23
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JAM Paper A6 Invitation Envelopes, 4.75" x 6.5", Black, 25/Pack (22115363)~#|#~m002934022_sc7JAM Paper A6 Invitation Envelopes, 4.75" x 6.5", Black, 25/Pack (22115363)~#|#~m002934021_sc7
Item: 38049
Model: 22115363
Price is $15.69
Unit of measure 25/Pack
Delivery by Tue, Dec 23
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LUX Open End Envelopes 6" x 11.5" White, 1000/box, 70lb. (61112-70W-1M)~#|#~m001406660_sc7
Item: 1277807
Model: 61112-70W-1M
No reviews yet
Price is $388.39
Unit of measure 1000/Box
Free delivery by Fri, Dec 26
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JAM Paper 12 x 18 Open End Foil Envelopes with Self-Adhesive Closure, Gold, 25/Pack (1323297)~#|#~m000067497_sc7
Item: 260926
Model: 1323297
No reviews yet
Price is $96.79
Unit of measure 25/Pack
Free delivery by Tue, Dec 23
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LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 250/Box, White w/Red LUX Lining (FLWH4872-01-250)~#|#~m006267576_sc7LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 250/Box, White w/Red LUX Lining (FLWH4872-01-250)~#|#~m005823929_sc7
Item: 387915
Model: FLWH4872-01-250
No reviews yet
Price is $56.99
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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JAM Paper 7 1/2 x 7 1/2 Square Envelopes, Ruby Red, 500 Pack (EX8555-18-500)~#|#~sp228873523_sc7
Item: 24578463
Model: EX8555-18-500
No reviews yet
Price is $102.66
Unit of measure 500/Pack
Free delivery by Tue, Dec 23
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LUX 5 1/2 x 5 1/2 Square Envelopes 50/Pack, 80lb. Bright White (8515-80W-50)~#|#~sp14807960_sc7
Item: 24260207
Model: 8515-80W-50
No reviews yet
Price is $16.59
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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JAM Paper 9 x 12 Booklet Colored Envelopes, Ultra Lime Green, 50/Pack (5156771i)~#|#~sp4211424_sc7JAM Paper 9 x 12 Booklet Colored Envelopes, Ultra Lime Green, 50/Pack (5156771i)~#|#~sp4211423_sc7
Item: 2478032
Model: 5156771I
No reviews yet
Price is $38.49
Unit of measure 50/Pack
Free delivery by Tue, Dec 23
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 500/Box, Natural (4872-01-500)~#|#~m000211233_sc7
Item: 516319
Model: 4872-01-500
No reviews yet
Price is $88.69
Free delivery by Fri, Dec 26
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JAM Paper #3 Coin Business Envelopes, 2.5 x 4.25, Baby Pink, 25/Pack (356730543)~#|#~m003757866_sc7JAM Paper #3 Coin Business Envelopes, 2.5 x 4.25, Baby Pink, 25/Pack (356730543)~#|#~m003562850_sc7
Item: 2103482
Model: 356730543
No reviews yet
Price is $9.99
Unit of measure 25/Pack
Delivery by Tue, Dec 23
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LUX 4 1/8" x 9 1/2" #10 60lbs. Envelopes, White With Red LUX Lining, 50/Pack~#|#~m000081263_sc7
Item: 281874
Model: FLWH4260-01-50
Price is $28.69
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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LUX A2 (4 3/8 x 5 3/4) 250/Box, Natural (5870-01-250)~#|#~m000161343_sc7
Item: 385409
Model: 5870-01-250
Price is $46.59
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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JAM Paper 8.5 x 8.5 Square Invitation Envelopes, Black Linen, 25/Pack (V01214)~#|#~m003905219_sc7JAM Paper 8.5 x 8.5 Square Invitation Envelopes, Black Linen, 25/Pack (V01214)~#|#~m003905218_sc7
Item: 261580
Model: V01214
No reviews yet
Price is $25.99
Unit of measure 25/Pack
Delivery by Tue, Dec 23
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LUX Self Seal #10 Window Envelope, 4 1/2" x 9 1/2", White Wove, 500/Pack (10APW-WW-500)~#|#~sp5822112_sc7LUX Self Seal #10 Window Envelope, 4 1/2" x 9 1/2", White Wove, 500/Pack (10APW-WW-500)~#|#~sp5875295_sc7
Item: 23996358
Model: 10APW-WW-500
No reviews yet
Price is $196.99
Unit of measure 500/Pack
Free delivery by Fri, Dec 26
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LUX A6 Invitation Envelopes, 4.75" x 6.5", Natural Linen, 250/Box (4875-NLI-250)~#|#~m000161355_sc7
Item: 384781
Model: 4875-NLI-250
No reviews yet
Price is $65.09
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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LUX 60lbs. 4 1/8" x 9 1/2" #10 Business Envelopes, White With Black LUX Lining, 250/BX~#|#~m000081261_sc7
Item: 387904
Model: FLWH4260-02-250
Price is $85.29
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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Over 30
JAM Paper A2 Invitation Envelope 4 3/8" x 5 3/4", Presidential Blue, 25/Pack (563913396)~#|#~533A953B-4BEF-42BE-9568CF0F89AAF5B8_sc7JAM Paper A2 Invitation Envelope 4 3/8" x 5 3/4", Presidential Blue, 25/Pack (563913396)~#|#~C0571050-9254-42C1-82F7C18BE1C63560_sc7
JAM Paper A2 Invitation Envelope 4 3/8" x 5 3/4", Presidential Blue, 25/Pack (563913396) is Out of stock
Item: 261128
Model: 563913396
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Price is $14.29
Unit of measure 25/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.