JAM Paper Expandable Open End Catalog Envelopes with Peel & Seal Closure, 4.5 x 9.5 x 2, White, 250/Box (376634173b)~#|#~sp74203689_sc7JAM Paper Expandable Open End Catalog Envelopes with Peel & Seal Closure, 4.5 x 9.5 x 2, White, 250/Box (376634173b)~#|#~sp74203981_sc7
Item: 24295260
Model: 376634173B
No reviews yet
Price is $383.59
Unit of measure 250/Pack
Free delivery by Fri, Dec 19
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LUX Open End Envelopes 9" x 12", Pool Blue~#|#~m001406667_sc7
Item: 1277800
Model: LUX-1590-102-1M
No reviews yet
Price is $489.89
Unit of measure 1000/Box
Free delivery by Tue, Dec 23
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JAM Paper 4Bar A1 Translucent Vellum Envelopes, 3.625 x 5.125, Platinum Silver, 25/Pack (1591590)~#|#~m004671927_sc7JAM Paper 4Bar A1 Translucent Vellum Envelopes, 3.625 x 5.125, Platinum Silver, 25/Pack (1591590)~#|#~m004671926_sc7
Item: 262262
Model: 1591590
No reviews yet
Price is $36.49
Unit of measure 25/Pack
Free delivery by Fri, Dec 19
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LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 100% Cotton 50/Pack, Natural White - 100% Cotton (4875-SN-50)~#|#~sp14807769_sc7
Item: 24260467
Model: 4875-SN-50
No reviews yet
Price is $24.19
Unit of measure 50/Pack
Delivery by Tue, Dec 23
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JAM Paper A7 Parchment Invitation Envelopes, 5.25 x 7.25, Natural Recycled, Bulk 1000/Carton (35394B)~#|#~m007049436_sc7JAM Paper A7 Parchment Invitation Envelopes, 5.25 x 7.25, Natural Recycled, Bulk 1000/Carton (35394B)~#|#~m007049435_sc7
Item: 261922
Model: 35394B
No reviews yet
Price is $257.39
Unit of measure 1000/Carton
Free delivery by Fri, Dec 19
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JAM Paper 6.25 x 7.875 Open End Catalog Foil Envelopes with Self-Adhesive Closure, Blue Santa, 25/Pack (1333327)~#|#~m000141498_sc7
Item: 362865
Model: 1333327
No reviews yet
Price is $33.99
Unit of measure 25/Pack
Delivery by Fri, Dec 19
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JAM Paper Cellophane Envelope with Self-Adhesive Closure, 5.0625 x 7.1875, Peach, 100/Pack (2785508)~#|#~m000969558_sc7
Item: 235574
Model: 2785508
No reviews yet
Price is $48.99
Unit of measure 100/Pack
Free delivery by Fri, Dec 19
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LUX 9 x 12 Booklet Envelopes 50/Pack, Holiday Green (LUX-4899-17-50)~#|#~sp14807574_sc7
Item: 24260255
Model: LUX-4899-17-50
No reviews yet
Price is $34.59
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) 500/Pack, Blonde Metallic (5380-M07-500)~#|#~sp14807810_sc7
Item: 24261102
Model: 5380-M07-500
No reviews yet
Price is $142.77
Unit of measure 500/Pack
Free delivery by Tue, Dec 23
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LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Black w/Red LUX Lining (FLBK4872-01-50)~#|#~m004940476_sc7LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 50/Box, Black w/Red LUX Lining (FLBK4872-01-50)~#|#~m005823918_sc7
Item: 282540
Model: FLBK4872-01-50
No reviews yet
Price is $32.79
Unit of measure 50/Pack
Delivery by Tue, Dec 23
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Over 30
LUX W-2 / 1099 Envelopes (5 3/4 x 8) 250/Pack, White (7489-W2-250)~#|#~sp5822112_sc7LUX W-2 / 1099 Envelopes (5 3/4 x 8) 250/Pack, White (7489-W2-250)~#|#~sp5875302_sc7
Item: 23996254
Model: 7489-W2-250
Price is $83.59
Unit of measure 250/Pack
Free delivery by Tue, Dec 23
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Lux Double Window Invoice Envelopes, 4-1/8 x 9-1/8", Ruby Red, 250/Pack~#|#~m002084693_sc7
Item: 1559062
Model: INVDW-18-250
Price is $103.89
Free delivery by Tue, Dec 23
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LUX A8 Foil Lined Invitation Envelopes (5 1/2 x 8 1/8) 50/Box, White w/Red LUX Lining (FLWH4885-01-50)~#|#~m000082135_sc7
Item: 282890
Model: FLWH4885-01-50
No reviews yet
Price is $50.19
Unit of measure 50/Pack
Free delivery by Tue, Dec 23
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JAM Paper 8.75 x 11.5 Booklet Translucent Vellum Envelopes, Clear, 50/Pack (2851370i)~#|#~sp126919527_sc7JAM Paper 8.75 x 11.5 Booklet Translucent Vellum Envelopes, Clear, 50/Pack (2851370i)~#|#~sp126919526_sc7
Item: 24006070
Model: 2851370I
No reviews yet
Price is $80.99
Unit of measure 50/Pack
Free delivery by Fri, Dec 19
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JAM Paper 10 x 13 Open End Catalog Envelopes, Teal, 25/Pack (31287545)~#|#~m003904918_sc7JAM Paper 10 x 13 Open End Catalog Envelopes, Teal, 25/Pack (31287545)~#|#~m003904917_sc7
Item: 362400
Model: 31287545
No reviews yet
Price is $30.99
Unit of measure 25/Pack
Delivery by Fri, Dec 19
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JAM Paper 10 x 13 Open End Catalog Envelopes, Dark Purple, 25/Pack (1287032a)~#|#~sp4800483_sc7JAM Paper 10 x 13 Open End Catalog Envelopes, Dark Purple, 25/Pack (1287032a)~#|#~sp4800482_sc7
Item: 24175171
Model: 1287032A
No reviews yet
Price is $33.39
Unit of measure 25/Pack
Delivery by Fri, Dec 19
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Over 30
LUX Double Window Invoice Envelopes (4 1/8 x 9 1/8) 500/Box, Pool (INVDW-102-500)~#|#~m004063893_sc7
Item: 2147437
Model: INVDW-102-500
No reviews yet
Price is $123.59
Unit of measure 500/Pack
Free delivery by Tue, Dec 23
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LUX Exclusive Moistenable Glue #10 Invitation Envelopes, 6 1/2" x 6 1/2", Garnet Red, 500/Box (EX8535-26-500)~#|#~m000081569_sc7
Item: 387393
Model: EX8535-26-500
No reviews yet
Price is $175.82
Unit of measure 500/Box
Free delivery by Tue, Dec 23
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JAM Paper A2 Metallic Invitation Envelopes, 4.375 x 5.75, Stardream Silver, Bulk 250/Box (GCST609H)~#|#~m004672431_sc7JAM Paper A2 Metallic Invitation Envelopes, 4.375 x 5.75, Stardream Silver, Bulk 250/Box (GCST609H)~#|#~m004672430_sc7
Item: 1589275
Model: GCST609H
No reviews yet
Price is $220.49
Unit of measure 250/Box
Free delivery by Fri, Dec 19
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LUX 6 1/2 x 6 1/2 Square Envelopes, 250/Box, Holiday Red (8535-15-250)~#|#~m000081572_sc7
Item: 385803
Model: 8535-15-250
No reviews yet
Price is $60.09
Unit of measure 250/Box
Free delivery by Tue, Dec 23
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70 lb 4" x 4" Peel & Press Square Envelopes, Grocery Bag Brown, 250/Box~#|#~m001149704_sc7
Item: 1028593
Model: 8504-GB-250
No reviews yet
Price is $99.17
Free delivery by Tue, Dec 23
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LUX 60lbs. 5 3/4" x 8 3/4" A9 Invitation Envelopes W/Glue, Holiday Red, 250/BX~#|#~m000082161_sc7
Item: 383934
Model: 14257-250
No reviews yet
Price is $53.19
Unit of measure 250/Box
Free delivery by Tue, Dec 23
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Holiday Green (FE4280-12-1000)~#|#~m005902339_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Holiday Green (FE4280-12-1000)~#|#~m005823952_sc7
Item: 387841
Model: FE4280-12-1000
Price is $114.59
Unit of measure 1000/Box
Free delivery by Tue, Dec 23
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LUX A10 Envelope - 24lb. White, Machine Insertable 250/Pack, 24lb. White (A10-24WMI-250)~#|#~sp12274947_sc7LUX A10 Envelope - 24lb. White, Machine Insertable 250/Pack, 24lb. White (A10-24WMI-250)~#|#~sp12275039_sc7
Item: 24161724
Model: A10-24WMI-250
No reviews yet
Price is $68.19
Unit of measure 250/Pack
Free delivery by Tue, Dec 23
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LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 500/Box, 80lb. Bright White (72973-80W-500)~#|#~m001149707_sc7
Item: 1028601
Model: 72973-80W-500
No reviews yet
Price is $98.79
Free delivery by Tue, Dec 23
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Over 30
LUX Double Window Invoice Envelopes (4 1/8 x 9 1/8) 50/Box, Grocery Bag (INVDW-GB-50)~#|#~m004063728_sc7
Item: 2147472
Model: INVDW-GB-50
No reviews yet
Price is $48.79
Unit of measure 50/Pack
Free delivery by Tue, Dec 23
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LUX A9 Invitation Envelopes (5 3/4 x 8 3/4) 50/Pack, Blush (LUX-4895-39-50)~#|#~sp5822112_sc7LUX A9 Invitation Envelopes (5 3/4 x 8 3/4) 50/Pack, Blush (LUX-4895-39-50)~#|#~sp5874345_sc7
Item: 23996572
Model: LUX-4895-39-50
No reviews yet
Price is $25.99
Unit of measure 50/Pack
Delivery by Tue, Dec 23
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JAM Paper 6.5" x 6.5" Square Translucent Vellum Invitation Envelopes, Burgundy, 100/Pack (2813778B)~#|#~sp137085979_sc7
Item: 38052
Model: 2813778B
No reviews yet
Price is $64.99
Unit of measure 100/Pack
Free delivery by Fri, Dec 19
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LUX 5 1/2 x 5 1/2 Square Envelopes, 50/Box, Grocery Bag (8515-GB-50)~#|#~m000081483_sc7
Item: 282114
Model: 8515-GB-50
No reviews yet
Price is $37.19
Unit of measure 50/Pack
Free delivery by Tue, Dec 23
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LUX 80lbs. 4 3/8" x 5 3/4" A2 RSVP, Invitation Envelopes W/Peel & Press, Vintage Plum Purple, 250BX~#|#~m000081836_sc7
Item: 388567
Model: LUX-4870-104-25
No reviews yet
Price is $71.76
Unit of measure 250/Box
Free delivery by Tue, Dec 23
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Over 30
JAM Paper A8 Colored Invitation Envelopes, 5.5 x 8.125, Red Recycled, 50/Pack (27799I)~#|#~sp132864447_sc7JAM Paper A8 Colored Invitation Envelopes, 5.5 x 8.125, Red Recycled, 50/Pack (27799I)~#|#~sp132864446_sc7
Item: 1589210
Model: 27799I
No reviews yet
Price is $24.49
Unit of measure 50/Pack
Delivery by Fri, Dec 19
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LUX A2 (4 3/8 x 5 3/4) - 70lb. White Wove 50/Pack, 70lb. Bright White (20446-50)~#|#~sp14807858_sc7
Item: 24260337
Model: 20446-50
No reviews yet
Price is $21.99
Unit of measure 50/Pack
Delivery by Tue, Dec 23
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Over 30
JAM Paper Cellophane Envelope with Self-Adhesive Closure, 3.6875 x 2.375, Clear, 1000/Carton (BUSCARDCELLOB)~#|#~m000068423_sc7
Item: 262942
Model: BUSCARDCELLOB
No reviews yet
Price is $209.99
Unit of measure 1000/Carton
Free delivery by Fri, Dec 19
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Over 30
JAM Paper 6 x 6 Square Colored Invitation Envelopes, Green Recycled, Bulk 250/Box (2792267H)~#|#~m003904795_sc7JAM Paper 6 x 6 Square Colored Invitation Envelopes, Green Recycled, Bulk 250/Box (2792267H)~#|#~m003904794_sc7
Item: 1589779
Model: 2792267H
No reviews yet
Price is $236.99
Unit of measure 250/Box
Free delivery by Fri, Dec 19
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Over 30
JAM Paper 4Bar A1 Invitation Envelopes, 3.625 x 5.125, Aqua Blue, 25/Pack (5157439)~#|#~m003904892_sc7JAM Paper 4Bar A1 Invitation Envelopes, 3.625 x 5.125, Aqua Blue, 25/Pack (5157439)~#|#~m003904891_sc7
Item: 363580
Model: 5157439
Price is $12.99
Unit of measure 25/Pack
Delivery by Fri, Dec 19
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Over 30
LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Navy (LUX-4880-103-25)~#|#~m005902344_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Navy (LUX-4880-103-25)~#|#~m005823963_sc7
Item: 388655
Model: LUX-4880-103-25
No reviews yet
Price is $44.29
Unit of measure 250/Box
Free delivery by Tue, Dec 23
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Over 30
JAM Paper Kraft Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Brown Kraft Paper Bag, 500/Pack (6314842H)~#|#~sp74308924_sc7JAM Paper Kraft Open End #10 Currency Envelope, 4 1/8" x 9 1/2", Brown Kraft Paper Bag, 500/Pack (6314842H)~#|#~sp74308921_sc7
Item: 1589710
Model: 6314842H
No reviews yet
Price is $189.49
Unit of measure 500/Box
Free delivery by Fri, Dec 19
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Over 30
JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Violet Purple Recycled, Bulk 1000/Carton (356730550C)~#|#~m003757872_sc7JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Violet Purple Recycled, Bulk 1000/Carton (356730550C)~#|#~m003562852_sc7
Item: 2103415
Model: 356730550C
No reviews yet
Price is $271.99
Unit of measure 1000/Carton
Free delivery by Fri, Dec 19
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Over 30
LUX A2 (4 3/8 x 5 3/4) 250/Box, Jupiter Metallic (5370-20-250)~#|#~m000081792_sc7
Item: 385175
Model: 5370-20-250
No reviews yet
Price is $68.09
Unit of measure 250/Box
Free delivery by Tue, Dec 23
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LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 500/Box, White w/Silver LUX Lining (FLWH4872-03-500)~#|#~m000081884_sc7
Item: 513830
Model: FLWH4872-03-500
No reviews yet
Price is $124.89
Free delivery by Tue, Dec 23
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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.