Sponsored Products
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JAM Paper 8.5 x 8.5 Square Invitation Envelopes, Dark Orange, 50/Pack (3157503I)~#|#~m003904836_sc7JAM Paper 8.5 x 8.5 Square Invitation Envelopes, Dark Orange, 50/Pack (3157503I)~#|#~m003904835_sc7
Item: 1588464
Model: 3157503I
No reviews yet
Price is $58.99
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Wisteria Purple, 50/Pack (PACV514I)~#|#~m006948422_sc7JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Wisteria Purple, 50/Pack (PACV514I)~#|#~m006948421_sc7
Item: 1588458
Model: PACV514I
No reviews yet
Price is $58.99
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Black Linen (4865-BLI-50)~#|#~m000081688_sc7
Item: 282350
Model: 4865-BLI-50
No reviews yet
Price is $22.69
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper® Plastic Envelopes with Button and String Tie Closure, #10 Business Booklet, 5.25 x 10, Black, 108/Pack (921B1BLB)~#|#~m005744815_sc7JAM Paper® Plastic Envelopes with Button and String Tie Closure, #10 Business Booklet, 5.25 x 10, Black, 108/Pack (921B1BLB)~#|#~m000067462_sc7
Item: 260881
Model: 921B1BLB
No reviews yet
Price is $211.79
Unit of measure 108/Box
Free delivery by Mon, Feb 16
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JAM Paper Kraft A9 Invitation Envelopes, 5.75 x 8.75, Brown Kraft Paper Bag, Bulk 1000/Carton (LEKR875B)~#|#~sp121511775_sc7JAM Paper Kraft A9 Invitation Envelopes, 5.75 x 8.75, Brown Kraft Paper Bag, Bulk 1000/Carton (LEKR875B)~#|#~sp121511774_sc7
Item: 261552
Model: LEKR875B
No reviews yet
Price is $412.49
Unit of measure 1000/Carton
Free delivery by Mon, Feb 16
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LUX 5 1/2 x 5 1/2 Square Envelopes, 250/Box, Midnight Black (F-8515-B-250)~#|#~m000081489_sc7
Item: 387527
Model: F-8515-B-250
No reviews yet
Price is $88.09
Unit of measure 250/Box
Free delivery by Wed, Feb 18
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Silver Metallic (5365-06-50)~#|#~m000081736_sc7
Item: 282400
Model: 5365-06-50
No reviews yet
Price is $26.59
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper Square Envelopes, Peel & Press, Seafoam Green, 3 1/4 x 3 1/4, 50 Pack (8503-113-50)~#|#~sp228873533_sc7
Item: 24578481
Model: 8503-113-50
No reviews yet
Price is $17.59
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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Quality Park Gummed Currency Envelopes, 2 1/2" x 4 1/4", Brown, 500/Box (QUA50262)~#|#~sp46039004_sc7
Item: QUA50262
Model: QUA50262
Price is $96.59
Unit of measure Box
Free delivery by Thu, Feb 12
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JAM Paper 7.5 x 7.5 Square Colored Invitation Envelopes, Red Recycled, 50/Pack (2792291I)~#|#~m002934107_sc7JAM Paper 7.5 x 7.5 Square Colored Invitation Envelopes, Red Recycled, 50/Pack (2792291I)~#|#~m002934106_sc7
Item: 1588434
Model: 2792291I
No reviews yet
Price is $49.99
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Blush Pink, 250 Pack (4860-114-250)~#|#~sp226423804_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Blush Pink, 250 Pack (4860-114-250)~#|#~sp226423803_sc7
Item: 24578397
Model: 4860-114-250
No reviews yet
Price is $49.59
Unit of measure 250/Pack
Free delivery by Mon, Feb 16
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JAM Paper 4Bar A1 Parchment Invitation Envelopes, 3.625 x 5.125, White Recycled, 25/Pack (900926656)~#|#~m000067959_sc7
Item: 261885
Model: 900926656
No reviews yet
Price is $10.29
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, Smoke (EX4875-22-50)~#|#~m000081953_sc7
Item: 282663
Model: EX4875-22-50
No reviews yet
Price is $22.09
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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LUX 80lbs. 5 1/4" x 7 1/4" A7 Invitation Envelopes W/Peel & Press, Black/Gold, 100/BX~#|#~m000082007_sc7
Item: 388349
Model: FLBK4880-04-100
No reviews yet
Price is $235.77
Unit of measure 1000/Box
Free delivery by Wed, Feb 18
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JAM Paper 4Bar A1 Translucent Vellum Invitation Envelopes, 3.625 x 5.125, Orange, 25/Pack (1591617)~#|#~m000068159_sc7
Item: 262313
Model: 1591617
No reviews yet
Price is $21.99
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX 70lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes W/Glue, Smoke Gray, 250/BX~#|#~m000081283_sc7
Item: 386958
Model: EX7716-22-250
No reviews yet
Price is $115.94
Unit of measure 250/Box
Free delivery by Wed, Feb 18
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JAM Paper Square Envelopes, Peel & Press, Seafoam, 3 1/4 x 3 1/4, 250 Pack (8503-113-250)~#|#~sp228873565_sc7
Item: 24578557
Model: 8503-113-250
No reviews yet
Price is $48.31
Unit of measure 250/Pack
Free delivery by Mon, Feb 16
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LUX 9 x 12 Booklet Envelopes 50/Pack, Vintage Plum (LUX-4899-104-50)~#|#~sp14807593_sc7
Item: 24261334
Model: LUX-4899-104-50
No reviews yet
Price is $22.93
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM PAPER Self Seal #5 Coin Business Envelopes, 2 7/8" x 5 1/4", White, 50/Pack (356838555I)~#|#~6C407227-A6C6-4856-85A9AA1A7DD376F5_sc7
Item: 24557939
Model: 356838555I
No reviews yet
Price is $14.99
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Primary Yellow, 25/Pack (PACV516)~#|#~m003905178_sc7JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Primary Yellow, 25/Pack (PACV516)~#|#~m003905177_sc7
Item: 262277
Model: PACV516
No reviews yet
Price is $38.99
Unit of measure 25/Pack
Free delivery by Mon, Feb 16
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JAM Paper Self Seal Invitation Envelopes,  5 1/4" x 5 1/4", Midnight Black, 250/Pack (LUX-8510-B-250)~#|#~sp225303103_sc7JAM Paper Self Seal Invitation Envelopes,  5 1/4" x 5 1/4", Midnight Black, 250/Pack (LUX-8510-B-250)~#|#~sp225303102_sc7
Item: 24578536
Model: LUX-8510-B-250
No reviews yet
Price is $37.09
Unit of measure 250/Pack
Free delivery by Mon, Feb 16
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JAM Paper 5.5 x 5.5 Square Invitation Envelopes, White, Bulk 1000/Carton (28415C)~#|#~m007049349_sc7JAM Paper 5.5 x 5.5 Square Invitation Envelopes, White, Bulk 1000/Carton (28415C)~#|#~m007049348_sc7
Item: 261338
Model: 28415C
No reviews yet
Price is $298.99
Unit of measure 1000/Carton
Free delivery by Mon, Feb 16
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JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Primary Yellow, Bulk 250/Box (PACV526H)~#|#~m003905178_sc7JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Primary Yellow, Bulk 250/Box (PACV526H)~#|#~m003905177_sc7
Item: 1589732
Model: PACV526H
No reviews yet
Price is $236.99
Unit of measure 250/Box
Free delivery by Mon, Feb 16
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JAM Paper 8.5 x 8.5 Square Colored Invitation Envelopes, Green Recycled, 25/Pack (2792295)~#|#~m003904799_sc7JAM Paper 8.5 x 8.5 Square Colored Invitation Envelopes, Green Recycled, 25/Pack (2792295)~#|#~m003904798_sc7
Item: 261277
Model: 2792295
No reviews yet
Price is $25.99
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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80 lb 6 1/4" x 6 1/4" Peel & Press Square Linen Envelopes, Black, 50/Pack~#|#~m001149685_sc7
Item: 1030051
Model: 8530-BLI-50
Price is $36.99
Free delivery by Wed, Feb 18
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LUX 5 x 5 Square Envelopes, 500/Box, White Linen (8505-WLI-500)~#|#~m000081536_sc7
Item: 514823
Model: 8505-WLI-500
No reviews yet
Price is $121.39
Free delivery by Wed, Feb 18
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LUX A8 Invitation Envelopes (5 1/2 x 8 1/8) 50/Pack, Ruby Red (LUX-4885-18-50)~#|#~sp12274947_sc7LUX A8 Invitation Envelopes (5 1/2 x 8 1/8) 50/Pack, Ruby Red (LUX-4885-18-50)~#|#~sp12275050_sc7
Item: 24161682
Model: LUX-4885-18-50
No reviews yet
Price is $22.39
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper 7.5 x 7.5 Square Colored Invitation Envelopes, Red Recycled, 25/Pack (2792291)~#|#~m002934107_sc7JAM Paper 7.5 x 7.5 Square Colored Invitation Envelopes, Red Recycled, 25/Pack (2792291)~#|#~m002934106_sc7
Item: 235558
Model: 2792291
No reviews yet
Price is $26.69
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX Moistenable Glue Envelope 3 1/8" x 6 1/4", Pastel Gray, 250/Pack (WS-7615-250)~#|#~949DF982-4459-4531-B384BBFC09218AED_sc7LUX Moistenable Glue Envelope 3 1/8" x 6 1/4", Pastel Gray, 250/Pack (WS-7615-250)~#|#~B4322885-8592-4CBC-98CCBE5C757B0D37_sc7
Item: 23996542
Model: WS-7615-250
No reviews yet
Price is $58.49
Unit of measure 250/Pack
Free delivery by Wed, Feb 18
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JAM Paper Cellophane Envelope with Self-Adhesive Closure, 5.0625 x 7.1875, Purple, 100/Pack (2785510)~#|#~m000969560_sc7
Item: 235642
Model: 2785510
No reviews yet
Price is $48.99
Unit of measure 100/Pack
Free delivery by Mon, Feb 16
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LUX Moistenable Glue Envelope 3 1/8" x 6 1/4", Pastel Green, 250/Pack (WS-7613-250)~#|#~697A1C32-D1AB-4FE6-AB0A5AD00A375DCB_sc7LUX Moistenable Glue Envelope 3 1/8" x 6 1/4", Pastel Green, 250/Pack (WS-7613-250)~#|#~DF3B1E0A-B2AF-4A33-A5A5488DEF43AB46_sc7
Item: 23996722
Model: WS-7613-250
No reviews yet
Price is $52.89
Unit of measure 250/Pack
Free delivery by Wed, Feb 18
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JAM Paper 5.5 x 5.5 Square Translucent Vellum Invitation Envelopes, Primary Blue, Bulk 250/Box (PACV507H)~#|#~m003905176_sc7JAM Paper 5.5 x 5.5 Square Translucent Vellum Invitation Envelopes, Primary Blue, Bulk 250/Box (PACV507H)~#|#~m003905175_sc7
Item: 1589795
Model: PACV507H
No reviews yet
Price is $283.99
Unit of measure 250/Box
Free delivery by Mon, Feb 16
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 500/Box, Taupe Metallic (5380-M09-500)~#|#~m005902320_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 500/Box, Taupe Metallic (5380-M09-500)~#|#~m005823888_sc7
Item: 2146114
Model: 5380-M09-500
No reviews yet
Price is $199.69
Unit of measure 500/Pack
Free delivery by Wed, Feb 18
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JAM Paper A6 Foil Lined Invitation Envelopes, 4.75 x 6.5, Black Linen with Gold Foil, 50/Pack (3243678I)~#|#~m002934336_sc7JAM Paper A6 Foil Lined Invitation Envelopes, 4.75 x 6.5, Black Linen with Gold Foil, 50/Pack (3243678I)~#|#~m002934337_sc7
Item: 1588839
Model: 3243678I
Price is $38.09
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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LUX 80lbs. 4 3/4" x 6 1/2" A6 Invitation Envelopes W/Peel & Press, Vintage Plum Purple, 250/BX~#|#~m000081963_sc7
Item: 388636
Model: LUX-4875-104-25
No reviews yet
Price is $70.99
Unit of measure 250/Box
Free delivery by Wed, Feb 18
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JAM Paper A8 Colored Invitation Envelopes, 5.5 x 8.125, Red Recycled, Bulk 250/Box (27799H)~#|#~sp132864474_sc7JAM Paper A8 Colored Invitation Envelopes, 5.5 x 8.125, Red Recycled, Bulk 250/Box (27799H)~#|#~sp132864473_sc7
Item: 1589957
Model: 27799H
No reviews yet
Price is $82.99
Unit of measure 250/Box
Free delivery by Mon, Feb 16
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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, Feb 18
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LUX 6 1/2 x 6 1/2 Square Envelopes, 250/Box, Baby Blue (EX8535-13-250)~#|#~m000081552_sc7
Item: 387322
Model: EX8535-13-250
No reviews yet
Price is $105.89
Unit of measure 250/Box
Free delivery by Wed, Feb 18
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70 lb 6 1/4" x 6 1/4" Peel & Press Square Envelopes, Natural, 250/Box~#|#~m001149703_sc7
Item: 1028574
Model: 8530-01-250
No reviews yet
Price is $119.39
Free delivery by Wed, Feb 18
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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.