LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Smoke Gray, 500/BX~#|#~m000161299_sc7
Item: 516408
Model: EX4860-22-500
Price is $139.29
Free delivery by Mon, May 11
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LUX 80lb 4 1/8"x9 1/2" Open End #10 Envelopes, Navy Blue, 500/BX~#|#~m000081279_sc7
Item: 517160
Model: LUX-7716-103500
No reviews yet
Price is $211.89
Free delivery by Mon, May 11
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Quality Park Jumbo Open End Catalog Envelopes, 14"L x 18"H, Kraft, 25/Box (QUA42354)~#|#~sp44342894_sc7Quality Park Jumbo Open End Catalog Envelopes, 14"L x 18"H, Kraft, 25/Box (QUA42354)~#|#~sp44342893_sc7
Item: QUA42354
Model: QUA42354
Price is $32.59
Unit of measure Box
Delivery by Mon, May 04
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LUX 70lb 4 3/8"x5 3/4" A2 RSVP, Invitation Envelopes W/Glue, Candy Pink, 500/BX~#|#~m000081773_sc7
Item: 514439
Model: EX4870-14-500
No reviews yet
Price is $98.49
Free delivery by Mon, May 11
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JAM Paper 6 x 8 Open End Catalog Foil Envelopes with Zip Closure, Clear, 100/Pack (3006A58A2B)~#|#~m004672195_sc7JAM Paper 6 x 8 Open End Catalog Foil Envelopes with Zip Closure, Clear, 100/Pack (3006A58A2B)~#|#~m004672194_sc7
Item: 1227792
Model: 3006A58A2B
No reviews yet
Price is $108.99
Unit of measure 100/Pack
Free delivery by Thu, May 07
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JAM Paper 6.25 x 7.875 Open End Catalog Foil Envelopes with Self-Adhesive Closure, Blue, 25/Pack (1323271)~#|#~sp137086441_sc7JAM Paper 6.25 x 7.875 Open End Catalog Foil Envelopes with Self-Adhesive Closure, Blue, 25/Pack (1323271)~#|#~sp137085831_sc7
Item: 260891
Model: 1323271
No reviews yet
Price is $33.99
Unit of measure 25/Pack
Delivery by Thu, May 07
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JAM Paper 6 x 6 Square Invitation Envelopes, Dark Purple, 50/Pack (563912522I)~#|#~m003905005_sc7JAM Paper 6 x 6 Square Invitation Envelopes, Dark Purple, 50/Pack (563912522I)~#|#~m003905004_sc7
Item: 1588390
Model: 563912522I
Price is $58.99
Unit of measure 50/Pack
Free delivery by Thu, May 07
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JAM Paper 2.375 x 2.375 Mini Square Envelopes, White, Bulk 1000/Carton (0203642B)~#|#~sp137086853_sc7JAM Paper 2.375 x 2.375 Mini Square Envelopes, White, Bulk 1000/Carton (0203642B)~#|#~sp137086231_sc7
Item: 262668
Model: 0203642B
No reviews yet
Price is $227.99
Unit of measure 1000/Carton
Free delivery by Thu, May 07
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JAM Paper 4Bar A1 Translucent Vellum Invitation Envelopes, 3.625 x 5.125, Gold, 25/Pack (1591606)~#|#~m003904758_sc7JAM Paper 4Bar A1 Translucent Vellum Invitation Envelopes, 3.625 x 5.125, Gold, 25/Pack (1591606)~#|#~m003904757_sc7
Item: 262248
Model: 1591606
No reviews yet
Price is $30.99
Unit of measure 25/Pack
Delivery by Thu, May 07
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JAM Paper A10 Metallic Invitation Envelopes, 6 x 9.5, Stardream Silver, Bulk 250/Box (SD5390 06H)~#|#~m004672469_sc7JAM Paper A10 Metallic Invitation Envelopes, 6 x 9.5, Stardream Silver, Bulk 250/Box (SD5390 06H)~#|#~m004672468_sc7
Item: 1590079
Model: SD5390 06H
No reviews yet
Price is $283.99
Unit of measure 250/Box
Free delivery by Thu, May 07
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LUX Self Seal Booklet Envelope, 6" x 9", Smoke, 50/Pack (EX4820-22-50)~#|#~sp14807436_sc7
Item: 24261174
Model: EX4820-22-50
No reviews yet
Price is $25.79
Unit of measure 50/Pack
Delivery by Mon, May 11
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JAM Paper A8 Metallic Invitation Envelopes, 5.5 x 8.125, Stardream Silver, 50/Pack (V018294I)~#|#~m004672487_sc7JAM Paper A8 Metallic Invitation Envelopes, 5.5 x 8.125, Stardream Silver, 50/Pack (V018294I)~#|#~m004672486_sc7
Item: 1589118
Model: V018294I
No reviews yet
Price is $63.99
Unit of measure 50/Pack
Free delivery by Thu, May 07
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JAM Paper #10 Policy Metallic Business Envelopes, 4 1/8" x 9 1/2", Stardream Gold, 25/Pack (1261602)~#|#~m003904738_sc7JAM Paper #10 Policy Metallic Business Envelopes, 4 1/8" x 9 1/2", Stardream Gold, 25/Pack (1261602)~#|#~m003904737_sc7
Item: 261973
Model: 1261602
No reviews yet
Price is $23.59
Unit of measure 25/Pack
Delivery by Thu, May 07
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Over 30
LUX 6 .5" x 9.5" Open End Envelopes 50/Pack, Grocery Bag Brown,50/Pack(LUX-1645-GB-50)~#|#~sp5822112_sc7LUX 6 .5" x 9.5" Open End Envelopes 50/Pack, Grocery Bag Brown,50/Pack(LUX-1645-GB-50)~#|#~F7256EB4-0379-4C14-83E67527DD6AFF8A_sc7
Item: 23996457
Model: LUX-1645-GB-50
No reviews yet
Price is $25.49
Unit of measure 50/Pack
Delivery by Mon, May 11
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 500/Box, Sunflower (EX4875-12-500)~#|#~m000081956_sc7
Item: 386528
Model: EX4875-12-500
No reviews yet
Price is $117.99
Unit of measure 500/Box
Free delivery by Mon, May 11
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 250/Box, Vista Metallic (5365-29-250)~#|#~m000081745_sc7
Item: 385135
Model: 5365-29-250
No reviews yet
Price is $83.09
Unit of measure 250/Box
Free delivery by Mon, May 11
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JAM Paper A7 Metallic Invitation Envelopes, 5.25 x 7.25, Stardream Malachite Deep Green, Bulk 1000/Carton (GCST703B)~#|#~sp137086002_sc7
Item: 262087
Model: GCST703B
No reviews yet
Price is $677.99
Unit of measure 1000/Carton
Free delivery by Thu, May 07
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 250/Box, Garnet (LUX-4872-26-250)~#|#~m000081858_sc7
Item: 513669
Model: LUX-4872-26-250
No reviews yet
Price is $61.59
Free delivery by Mon, May 11
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LUX 7 x 7 Square Envelopes, 500/Box, Limelight (LUX-8545-101500)~#|#~m000081635_sc7
Item: 516901
Model: LUX-8545-101500
No reviews yet
Price is $129.39
Free delivery by Mon, May 11
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JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Dark Grey, 50/Pack (36396433I)~#|#~m004671968_sc7JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Dark Grey, 50/Pack (36396433I)~#|#~m004671967_sc7
Item: 1588917
Model: 36396433I
No reviews yet
Price is $17.99
Unit of measure 50/Pack
Delivery by Thu, May 07
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JAM Paper 6.5 x 6.5 Kraft Square Invitation Envelopes, Brown Kraft Paper Bag, Bulk 250/Box (63131150I)~#|#~m004542986_sc7JAM Paper 6.5 x 6.5 Kraft Square Invitation Envelopes, Brown Kraft Paper Bag, Bulk 250/Box (63131150I)~#|#~m004542985_sc7
Item: 2329332
Model: 63131150I
No reviews yet
Price is $236.99
Unit of measure 250/Box
Free delivery by Thu, May 07
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LUX A8 Foil Lined Invitation Envelopes (5 1/2 x 8 1/8) 250/Box, White w/Gold LUX Lining (FLWH4885-04-250)~#|#~m000082134_sc7
Item: 513789
Model: FLWH4885-04-250
No reviews yet
Price is $90.79
Free delivery by Mon, May 11
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JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Wisteria Purple, Bulk 250/Box (1592113H)~#|#~m006965559_sc7JAM Paper 6.5 x 6.5 Square Translucent Vellum Invitation Envelopes, Wisteria Purple, Bulk 250/Box (1592113H)~#|#~m006965558_sc7
Item: 1589728
Model: 1592113H
No reviews yet
Price is $158.99
Unit of measure 250/Box
Free delivery by Thu, May 07
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JAM Paper A2 Colored Invitation Envelopes, 4.375 x 5.75, Green Recycled, Bulk 1000/Carton (15843B)~#|#~sp121511868_sc7JAM Paper A2 Colored Invitation Envelopes, 4.375 x 5.75, Green Recycled, Bulk 1000/Carton (15843B)~#|#~sp121511866_sc7
Item: 261280
Model: 15843B
Price is $227.99
Unit of measure 1000/Carton
Free delivery by Thu, May 07
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LUX 5 1/2 x 5 1/2 Square Envelopes, 500/Box, Sunflower (EX8515-12-500)~#|#~m000081501_sc7
Item: 387034
Model: EX8515-12-500
No reviews yet
Price is $163.79
Unit of measure 500/Box
Free delivery by Mon, May 11
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LUX 4 3/4" x 6 1/2" A6 Invitation Envelopes W/Peel & Press, White/Silver LUX, 1000/BX~#|#~m000081969_sc7
Item: 388447
Model: FLWH4875-03-100
No reviews yet
Price is $174.79
Unit of measure 1000/Box
Free delivery by Mon, May 11
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JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Blue, 50/Pack (PACV357I)~#|#~m003905168_sc7JAM Paper #10 Business Translucent Vellum Envelopes, 4.125 x 9.5, Primary Blue, 50/Pack (PACV357I)~#|#~m003905167_sc7
Item: 1588572
Model: PACV357I
No reviews yet
Price is $39.99
Unit of measure 50/Pack
Free delivery by Thu, May 07
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LUX A6 Foil Lined Invitation Envelopes (4 3/4 x 6 1/2) 500/Box, White w/Gold LUX Lining (FLWH4875-04-500)~#|#~m000081967_sc7
Item: 513814
Model: FLWH4875-04-500
No reviews yet
Price is $103.69
Free delivery by Mon, May 11
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LUX 6 x 9 Booklet Envelopes 1000/Pack, Blush (LUX-4820-391000)~#|#~sp5822112_sc7LUX 6 x 9 Booklet Envelopes 1000/Pack, Blush (LUX-4820-391000)~#|#~sp5873990_sc7
Item: 23996151
Model: LUX-4820-391000
No reviews yet
Price is $216.69
Unit of measure 1000/Pack
Free delivery by Mon, May 11
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LUX Double Window Invoice Envelopes (4 1/8 x 9 1/8) 500/Box, Grocery Bag (INVDW-GB-500)~#|#~m004063728_sc7
Item: 2147438
Model: INVDW-GB-500
No reviews yet
Price is $124.49
Unit of measure 500/Pack
Free delivery by Mon, May 11
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LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Black w/Silver LUX Lining (FLBK4872-03-50)~#|#~m004940477_sc7LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Black w/Silver LUX Lining (FLBK4872-03-50)~#|#~m005823919_sc7
Item: 282542
Model: FLBK4872-03-50
No reviews yet
Price is $37.79
Unit of measure 50/Pack
Free delivery by Mon, May 11
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JAM Paper A10 Colored Invitation Envelopes, 6" x 9 1/2", Red Recycled, 50/Pack (96078I)~#|#~m002934115_sc7JAM Paper A10 Colored Invitation Envelopes, 6" x 9 1/2", Red Recycled, 50/Pack (96078I)~#|#~m002934114_sc7
Item: 1588827
Model: 96078I
No reviews yet
Price is $99.89
Unit of measure 50/Pack
Free delivery by Thu, May 07
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Over 30
LUX 9 x 9 Square Envelopes, 50/Box, Silver Metallic (8585-06-50)~#|#~m003307876_sc7
Item: 1985308
Model: 8585-06-50
No reviews yet
Price is $41.79
Unit of measure 50/Box
Free delivery by Mon, May 11
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LUX 70lbs. 5 3/4" x 8 3/4" A9 Invitation Envelopes W/Glue, Avocado Green, 250/BX~#|#~m000082147_sc7
Item: 386867
Model: EX4895-27-250
No reviews yet
Price is $116.59
Unit of measure 250/Box
Free delivery by Mon, May 11
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JAM Paper Self Seal Invitation Envelope, 3 1/4 x 3 1/4 , Smoke,  50 Pack, Gray (8503-22-50)~#|#~sp226423823_sc7JAM Paper Self Seal Invitation Envelope, 3 1/4 x 3 1/4 , Smoke,  50 Pack, Gray (8503-22-50)~#|#~sp226423822_sc7
Item: 24578484
Model: 8503-22-50
No reviews yet
Price is $12.29
Unit of measure 50/Pack
Delivery by Thu, May 07
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Quality Park Gummed Booklet Envelopes, 6" x 9", White Wove, 100/Box (QUA37113)~#|#~sp42718489_sc7Quality Park Gummed Booklet Envelopes, 6" x 9", White Wove, 100/Box (QUA37113)~#|#~sp42718488_sc7
Item: QUA37113
Model: QUA37113
Price is $35.79
Unit of measure Box
Free delivery by Mon, May 04
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Over 30
JAM Paper 3Drug Translucent Vellum Mini Envelopes, 2.3125 x 3.625, Clear, Bulk 1000/Carton (LECV900B)~#|#~sp126919178_sc7JAM Paper 3Drug Translucent Vellum Mini Envelopes, 2.3125 x 3.625, Clear, Bulk 1000/Carton (LECV900B)~#|#~sp126919177_sc7
Item: 262141
Model: LECV900B
No reviews yet
Price is $339.99
Unit of measure 1000/Carton
Free delivery by Thu, May 07
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JAM Paper A6 Strathmore Invitation Envelopes, 4.75 x 6.5, Natural White Wove, Bulk 1000/Carton (30243B)~#|#~m007159123_sc7JAM Paper A6 Strathmore Invitation Envelopes, 4.75 x 6.5, Natural White Wove, Bulk 1000/Carton (30243B)~#|#~m007159122_sc7
Item: 262645
Model: 30243B
No reviews yet
Price is $227.99
Unit of measure 1000/Carton
Free delivery by Thu, May 07
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JAM Paper 6.25 x 7.875 Open End Foil Envelopes with Self-Adhesive Closure, Gold Stars, 100/Pack (01323274B)~#|#~m000141497_sc7
Item: 363301
Model: 01323274B
No reviews yet
Price is $108.99
Unit of measure 100/Box
Free delivery by Thu, May 07
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LUX 60lbs. 5 1/2" x 8 1/8" A8 Invitation Envelopes W/Glue, Holiday Red, 500/BX~#|#~m000082128_sc7
Item: 385621
Model: 67146-500
No reviews yet
Price is $83.39
Unit of measure 500/Box
Free delivery by Mon, May 11
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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.