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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 1000/BX~#|#~m004940398_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Natural, 1000/BX~#|#~m005823989_sc7
Item: 384587
Model: 4860-NPC-1000
No reviews yet
Price is $184.29
Unit of measure 1000/Box
Free delivery by Tue, Dec 30
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JAM Paper 11.5" x 11.5" Large Square Invitation Envelopes, White, 25/Pack (3992321)~#|#~sp118566184_sc7JAM Paper 11.5" x 11.5" Large Square Invitation Envelopes, White, 25/Pack (3992321)~#|#~sp118566189_sc7
Item: 261310
Model: 3992321
Price is $40.29
Unit of measure 25/Pack
Free 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 Fri, Dec 26
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LUX 9 x 12 Kraft Open End Envelopes 250/Box, 28lb. White w/ Security Tint (WS-4894-ST-250)~#|#~m004063773_sc7
Item: 2146104
Model: WS-4894-ST-250
No reviews yet
Price is $78.89
Unit of measure 250/Pack
Free delivery by Tue, Dec 30
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 500/Box, Holiday Red (FE4275-15-500)~#|#~m000081919_sc7
Item: 387833
Model: FE4275-15-500
No reviews yet
Price is $111.69
Unit of measure 500/Box
Free delivery by Tue, Dec 30
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JAM Paper Kraft A2 Invitation Envelopes, 4.375 x 5.75, Brown Kraft Paper Bag, Bulk 250/Box (LEKR600H)~#|#~sp112110412_sc7JAM Paper Kraft A2 Invitation Envelopes, 4.375 x 5.75, Brown Kraft Paper Bag, Bulk 250/Box (LEKR600H)~#|#~sp112110411_sc7
Item: 1589280
Model: LEKR600H
Price is $85.09
Unit of measure 250/Box
Free delivery by Fri, Dec 26
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LUX 60lbs. 5 1/4" x 7 1/4" A7 Invitation Envelopes W/Peel & Press, White/Black, 100/BX~#|#~m000082097_sc7
Item: 388457
Model: FLWH4880-02-100
No reviews yet
Price is $189.69
Unit of measure 1000/Box
Free delivery by Tue, Dec 30
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LUX #1 Coin Envelopes (2 1/4 x 3 1/2) 50/Box, Taupe Metallic (1CO-M09-50)~#|#~m004846886_sc7
Item: 2444729
Model: 1CO-M09-50
No reviews yet
Price is $30.69
Unit of measure 50/Pack
Delivery by Tue, Dec 30
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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 Fri, Dec 26
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JAM Paper 9 x 12 Booklet Commercial Window Envelopes, White, 50/Pack (223932I)~#|#~sp73452810_sc7JAM Paper 9 x 12 Booklet Commercial Window Envelopes, White, 50/Pack (223932I)~#|#~sp73452724_sc7
Item: 24365131
Model: 223932I
Price is $60.99
Unit of measure 50/Pack
Free delivery by Fri, Dec 26
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JAM Paper A2 Invitation Envelopes, 4.375 x 5.75, Dark Purple, 50/Pack (563912506I)~#|#~m003904993_sc7JAM Paper A2 Invitation Envelopes, 4.375 x 5.75, Dark Purple, 50/Pack (563912506I)~#|#~m003904992_sc7
Item: 1589247
Model: 563912506I
Price is $23.29
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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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 Fri, Dec 26
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JAM Paper A8 Strathmore Invitation Envelopes, 5.5 x 8.125, Bright White Wove, 50/Pack (STTW761I)~#|#~m007159125_sc7JAM Paper A8 Strathmore Invitation Envelopes, 5.5 x 8.125, Bright White Wove, 50/Pack (STTW761I)~#|#~m007159124_sc7
Item: 1589242
Model: STTW761I
No reviews yet
Price is $22.19
Unit of measure 50/Pack
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 Tue, Dec 30
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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 Fri, Dec 26
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Quartz Metallic (5380-08-50)~#|#~21E69E6B-67C1-4CDB-BDEE1D60B1EB8306_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 50/Box, Quartz Metallic (5380-08-50)~#|#~ED7D13CC-8813-4FB0-90E95A042E40DE83_sc7
Item: 282816
Model: 5380-08-50
No reviews yet
Price is $19.99
Unit of measure 50/Pack
Delivery by Tue, Dec 30
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JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 50/Pack (34992I)~#|#~m007159127_sc7JAM Paper Strathmore Open End #10 Business Envelope, 4 1/8" x 9 1/2", Natural White Wove, 50/Pack (34992I)~#|#~m007159126_sc7
Item: 1588542
Model: 34992I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Holiday Red (FE4280-15-1000)~#|#~m000082035_sc7
Item: 387845
Model: FE4280-15-1000
No reviews yet
Price is $106.69
Unit of measure 1000/Box
Free delivery by Tue, Dec 30
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JAM Paper 4Bar A1 Colored Invitation Envelopes, 3.625 x 5.125, Red Recycled, 50/Pack (900927182I)~#|#~m002934111_sc7JAM Paper 4Bar A1 Colored Invitation Envelopes, 3.625 x 5.125, Red Recycled, 50/Pack (900927182I)~#|#~m002934110_sc7
Item: 1588713
Model: 900927182I
No reviews yet
Price is $19.49
Unit of measure 50/Pack
Delivery by Fri, Dec 26
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JAM Paper A2 Translucent Vellum Invitation Envelopes, 4.375 x 5.75, Clear, 50/Pack (53794I)~#|#~m002168712_sc7
Item: 1589051
Model: 53794I
No reviews yet
Price is $35.59
Unit of measure 50/Pack
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 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 Fri, Dec 26
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 1000/Box, Pastel Green (SH4275-04-1000)~#|#~m000081941_sc7
Item: 388099
Model: SH4275-04-1000
No reviews yet
Price is $141.59
Unit of measure 1000/Box
Free delivery by Tue, Dec 30
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JAM Paper Self Seal #3 Coin Business Envelopes, 2 1/2" x 4 1/4", White, 100/Pack (356838553D)~#|#~47C34D63-055A-4A93-A9B9AEE16D5D2414_sc7
Item: 24557995
Model: 356838553D
Price is $31.69
Unit of measure 100/Pack
Delivery by Fri, Dec 26
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LUX Self Seal #10 Window Envelope, 4 1/8" x 9 1/2", Midnight Black, 50/Pack (FFW-10-B-50)~#|#~m002084694_sc7
Item: 1559032
Model: FFW-10-B-50
No reviews yet
Price is $35.29
Free delivery by Tue, Dec 30
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JAM Paper Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", Blue, 50/Pack (5360-13-50)~#|#~sp228873505_sc7
Item: 24578435
Model: 5360-13-50
No reviews yet
Price is $21.79
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 Tue, Dec 30
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LUX 7 1/2 x 10 1/2 Booklet Envelopes 50/Pack, 24lb. Bright White (12252-50)~#|#~sp14807339_sc7
Item: 24261328
Model: 12252-50
No reviews yet
Price is $17.29
Unit of measure 50/Pack
Delivery by Tue, Dec 30
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LUX 9 x 12 Open End Envelopes 50/Pack, 14lb. (75852-50)~#|#~E36EDD45-9771-441F-B4099C2DAA14A223_sc7
Item: 24260320
Model: 75852-50
Price is $37.95
Unit of measure 50/Pack
Free delivery by Tue, Dec 30
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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.