JAM Paper A2 Colored Invitation Envelopes, 4.375 x 5.75, Sea Blue Recycled, 50/Pack (70207I)~#|#~sp123308096_sc7JAM Paper A2 Colored Invitation Envelopes, 4.375 x 5.75, Sea Blue Recycled, 50/Pack (70207I)~#|#~sp123308095_sc7
Item: 1589479
Model: 70207I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Thu, May 07
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LUX A2 (4 3/8 x 5 3/4) 50/Box, Seafoam (LUX-4870-113-50)~#|#~m000081822_sc7
Item: 282503
Model: LUX-4870-113-50
No reviews yet
Price is $18.49
Unit of measure 50/Pack
Delivery by Mon, May 11
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LUX 9" x 12" Open End Window Envelopes, Sunflower Yellow (LUX-1590-12-50)~#|#~m001406670_sc7
Item: 1277741
Model: LUX-1590-12-50
No reviews yet
Price is $46.79
Unit of measure 50/Pack
Free delivery by Mon, May 11
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LUX 5 1/2 x 5 1/2 Square Envelopes, 50/Box, Magenta (EX8515-10-50)~#|#~m000081487_sc7
Item: 282118
Model: EX8515-10-50
No reviews yet
Price is $21.99
Unit of measure 50/Pack
Delivery by Mon, May 11
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LUX A2 (4 3/8 x 5 3/4) 1000/Box, Natural Linen (4870-NLI-1000)~#|#~m000161363_sc7
Item: 384700
Model: 4870-NLI-1000
No reviews yet
Price is $150.09
Unit of measure 1000/Box
Free delivery by Mon, May 11
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JAM Paper® Plastic Envelopes with Button and String Tie Closure, Letter Booklet, 9.75 x 13, Lime Green, 12/Pack (218B1LI)~#|#~m004858019_sc7JAM Paper® Plastic Envelopes with Button and String Tie Closure, Letter Booklet, 9.75 x 13, Lime Green, 12/Pack (218B1LI)~#|#~m004857853_sc7
Item: 263056
Model: 218B1LI
Price is $33.69
Unit of measure 12/Pack Price per unit $2.81/Envelope
Delivery by Thu, May 07
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LUX 5 3/4" x 8 3/4" 70lbs. A9 Invitation Envelopes W/Glue, Sunflower Yellow, 50/Pack~#|#~m000082182_sc7
Item: 282948
Model: EX4895-12-50
Price is $34.79
Unit of measure 50/Pack
Delivery by Mon, May 11
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Pastel Green (SH4280-04-1000)~#|#~m000082065_sc7
Item: 388185
Model: SH4280-04-1000
No reviews yet
Price is $114.89
Unit of measure 1000/Box
Free delivery by Mon, May 11
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LUX Open End Window Envelopes  9" x 12", Midnight Black, 500/Box (LUX-1590-B-500)~#|#~BE5114D9-97C7-4F9C-853BC435D6AE75D2_sc7LUX Open End Window Envelopes  9" x 12", Midnight Black, 500/Box (LUX-1590-B-500)~#|#~32A67FD9-DC3A-422A-B0C2565D43D26DBF_sc7
Item: 1277772
Model: LUX-1590-B-500
No reviews yet
Price is $182.79
Unit of measure 500/Box
Free delivery by Mon, May 11
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JAM Paper A2 Strathmore Invitation Envelopes, 4.375 x 5.75, Bright White Wove, Bulk 250/Box (191151H)~#|#~sp112110294_sc7JAM Paper A2 Strathmore Invitation Envelopes, 4.375 x 5.75, Bright White Wove, Bulk 250/Box (191151H)~#|#~sp112110293_sc7
Item: 1589305
Model: 191151H
No reviews yet
Price is $78.99
Unit of measure 250/Box
Free delivery by Thu, May 07
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LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 50/Box, 70lb. Natural (72973-01-50)~#|#~m001149708_sc7
Item: 1030038
Model: 72973-01-50
No reviews yet
Price is $19.39
Delivery by Mon, May 11
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Pack, Gray - 100% Cotton (4880-SG-250)~#|#~sp14807898_sc7
Item: 24261130
Model: 4880-SG-250
No reviews yet
Price is $91.39
Unit of measure 250/Pack
Free delivery by Mon, May 11
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JAM Paper 4Bar A1 Strathmore Invitation Envelopes, 3.625 x 5.125, Natural White Wove, Bulk 250/Box (194891H)~#|#~m007159197_sc7JAM Paper 4Bar A1 Strathmore Invitation Envelopes, 3.625 x 5.125, Natural White Wove, Bulk 250/Box (194891H)~#|#~m007159196_sc7
Item: 1589359
Model: 194891H
No reviews yet
Price is $64.99
Unit of measure 250/Box
Free delivery by Thu, May 07
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LUX A6 Foil Lined Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, White w/Silver LUX Lining (FLWH4875-03-50)~#|#~m000081969_sc7
Item: 282682
Model: FLWH4875-03-50
No reviews yet
Price is $21.59
Unit of measure 50/Pack
Delivery by Mon, May 11
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Over 30
JAM Paper Kraft A7 Invitation Envelopes, 5.25 x 7.25, Brown Kraft Paper Bag, Bulk 250/Box (LEKR700H)~#|#~m004672451_sc7JAM Paper Kraft A7 Invitation Envelopes, 5.25 x 7.25, Brown Kraft Paper Bag, Bulk 250/Box (LEKR700H)~#|#~m004672450_sc7
Item: 1590174
Model: LEKR700H
No reviews yet
Price is $89.49
Unit of measure 250/Box
Free delivery by Thu, May 07
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LUX 70lbs. 5 3/4" x 8 3/4" A9 Invitation Envelopes W/Peel & Press, Ruby Red, 1000/BX~#|#~m000082178_sc7
Item: 386792
Model: EX4895-18-1000
No reviews yet
Price is $290.19
Unit of measure 1000/Box
Free delivery by Mon, May 11
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JAM Paper 8.5 x 8.5 Square Colored Invitation Envelopes, Red Recycled, 25/Pack (2794374)~#|#~m002934119_sc7JAM Paper 8.5 x 8.5 Square Colored Invitation Envelopes, Red Recycled, 25/Pack (2794374)~#|#~m002934118_sc7
Item: 260832
Model: 2794374
No reviews yet
Price is $27.99
Unit of measure 25/Pack
Delivery by Thu, May 07
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Lux Full Face Envelopes, Citrus 4.12 x 9.5 inch 1000/Pack~#|#~m002084636_sc7
Item: 1560079
Model: FFW-10-L20-1000
No reviews yet
Price is $158.89
Free delivery by Mon, May 11
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 250/Box, Azalea Metallic (5365-24-250)~#|#~m000081686_sc7
Item: 385121
Model: 5365-24-250
No reviews yet
Price is $94.19
Unit of measure 250/Box
Free delivery by Mon, May 11
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LUX #1 Coin Envelopes, 2.25" x 3.5", Wasabi, 500/Box (LUX-1CO-L22-500)~#|#~m001149687_sc7
Item: 1028519
Model: LUX-1CO-L22-500
No reviews yet
Price is $75.99
Free delivery by Mon, May 11
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LUX 6 x 9 Open End Envelopes, Silver Metallic, 250/Box (1644-06-250)~#|#~6A888FC5-5696-47B4-8178D6A45C0C6005_sc7LUX 6 x 9 Open End Envelopes, Silver Metallic, 250/Box (1644-06-250)~#|#~F189085B-C07B-4A74-B230128069DF78A1_sc7
Item: 1028647
Model: 1644-06-250
No reviews yet
Price is $126.99
Free delivery by Mon, May 11
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JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Orange Recycled, 25/Pack (356730558)~#|#~m003757870_sc7JAM Paper #6 Coin Business Colored Envelopes, 3.375 x 6, Orange Recycled, 25/Pack (356730558)~#|#~m003750595_sc7
Item: 2103405
Model: 356730558
Price is $11.49
Unit of measure 25/Pack
Delivery by Thu, May 07
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JAM Paper 4Bar A1 Strathmore Invitation Envelopes, 3.625 x 5.125, Natural White Wove, 25/Pack (194891)~#|#~m007159197_sc7JAM Paper 4Bar A1 Strathmore Invitation Envelopes, 3.625 x 5.125, Natural White Wove, 25/Pack (194891)~#|#~m007159196_sc7
Item: 262541
Model: 194891
No reviews yet
Price is $11.49
Unit of measure 25/Pack
Delivery by Thu, May 07
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JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Wisteria Purple, Bulk 250/Box (PACV514H)~#|#~m006948422_sc7JAM Paper 6 x 6 Square Translucent Vellum Invitation Envelopes, Wisteria Purple, Bulk 250/Box (PACV514H)~#|#~m006948421_sc7
Item: 1589729
Model: PACV514H
No reviews yet
Price is $283.99
Unit of measure 250/Box
Free delivery by Thu, May 07
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JAM Paper A2 Foil Lined Invitation Envelopes, 4.375 x 5.75, White with Red Foil, 50/Pack (72158I)~#|#~m003904622_sc7JAM Paper A2 Foil Lined Invitation Envelopes, 4.375 x 5.75, White with Red Foil, 50/Pack (72158I)~#|#~m003904621_sc7
Item: 1588942
Model: 72158I
No reviews yet
Price is $19.49
Unit of measure 50/Pack
Delivery by Thu, May 07
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JAM Paper A6 Invitation Envelope, 4 3/4" x 6 1/2", White, 1000/Pack (31820B)~#|#~m003904578_sc7JAM Paper A6 Invitation Envelope, 4 3/4" x 6 1/2", White, 1000/Pack (31820B)~#|#~m003904577_sc7
Item: 366221
Model: 31820B
Price is $134.19
Unit of measure 1000/Carton
Free delivery by Thu, May 07
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LUX 9 x 9 Square Envelopes, 50/Box, Midnight Black (F-8585-B-50)~#|#~m000081489_sc7
Item: 282324
Model: F-8585-B-50
No reviews yet
Price is $30.49
Unit of measure 50/Pack
Delivery by Mon, May 11
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Over 30
JAM Paper #3 Coin Business Colored Envelopes, 2.5 x 4.25, Orange Recycled, 100/Pack (356730538B)~#|#~m003757861_sc7JAM Paper #3 Coin Business Colored Envelopes, 2.5 x 4.25, Orange Recycled, 100/Pack (356730538B)~#|#~m003750592_sc7
Item: 2103475
Model: 356730538B
No reviews yet
Price is $35.49
Unit of measure 100/Pack
Free delivery by Thu, May 07
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Over 30
JAM Paper 10 x 13 Open End Catalog Envelopes, Presidential Blue, 50/Pack (263919489i)~#|#~sp12489291_sc7JAM Paper 10 x 13 Open End Catalog Envelopes, Presidential Blue, 50/Pack (263919489i)~#|#~sp12489290_sc7
Item: 24175155
Model: 263919489I
No reviews yet
Price is $63.49
Unit of measure 50/Pack
Free delivery by Thu, May 07
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LUX A4 Foil Lined Invitation Envelopes (4 1/4 x 6 1/4) 250/Box, White w/Black LUX Lining (FLWH4872-02-250)~#|#~m005823927_sc7
Item: 387916
Model: FLWH4872-02-250
No reviews yet
Price is $61.39
Unit of measure 250/Box
Free delivery by Mon, May 11
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LUX #1 Coin Envelopes (2 1/4 x 3 1/2) 500/Box, Mandarin (LUX-1CO-11-500)~#|#~m001149696_sc7
Item: 1029981
Model: LUX-1CO-11-500
No reviews yet
Price is $109.69
Free delivery by Mon, May 11
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JAM Paper Invitation Envelope 6 1/2" x 6 1/2", Tan Beige, 50/Pack (227914986i)~#|#~C7950090-FC6A-439E-A4A2F8D1F5E0C0A3_sc7JAM Paper Invitation Envelope 6 1/2" x 6 1/2", Tan Beige, 50/Pack (227914986i)~#|#~74C09208-24E6-4919-A7CD001AEF8D5030_sc7
Item: 24604657
Model: 227914986i
No reviews yet
Price is $49.99
Unit of measure 50/Pack
Free delivery by Thu, May 07
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Over 30
LUX 80lbs. 5 3/4" x 8 3/4" A9 Invitation Envelopes W/Glue, Jupiter Metallic Red Red, 500/BX~#|#~m000082163_sc7
Item: 385389
Model: 5395-20-500
No reviews yet
Price is $189.99
Unit of measure 500/Box
Free delivery by Mon, May 11
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Over 30
LUX 60lbs. 5 3/4" x 8 3/4" A9 Invitation Envelopes W/Peel & Press, White/Silver LUX, 250/BX~#|#~m000082192_sc7
Item: 387931
Model: FLWH4895-03-250
No reviews yet
Price is $153.59
Unit of measure 250/Box
Free delivery by Mon, May 11
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JAM Paper Square Envelopes, Peel & Press, Avocado Green, 6 1/4 x 6 1/4, 250 Pack (8530-2502-250)~#|#~sp228873522_sc7
JAM Paper Square Envelopes, Peel & Press, Avocado Green, 6 1/4 x 6 1/4, 250 Pack (8530-2502-250) is Out of stock
Item: 24578462
Model: 8530-102-250
No reviews yet
Price is $46.59
Unit of measure 250/Pack
JAM Paper A9 Metallic Invitation Envelopes, 5.75 x 8.75, Stardream Silver, 50/Pack (211817120I)~#|#~m005223526_sc7JAM Paper A9 Metallic Invitation Envelopes, 5.75 x 8.75, Stardream Silver, 50/Pack (211817120I)~#|#~m005223525_sc7
JAM Paper A9 Metallic Invitation Envelopes, 5.75 x 8.75, Stardream Silver, 50/Pack (211817120I) is Out of stock
Item: 1588736
Model: 211817120I
No reviews yet
Price is $96.89
Unit of measure 50/Pack
LUX A2 (4 3/8 x 5 3/4) 50/Box, Azalea Metallic (5370-24-50)~#|#~m000081766_sc7
LUX A2 (4 3/8 x 5 3/4) 50/Box, Azalea Metallic (5370-24-50) is Out of stock
Item: 282432
Model: 5370-24-50
No reviews yet
Price is $12.69
Unit of measure 50/Pack
JAM Paper Self Seal #6 Coin Business Envelopes, 3 3/8" x 6", White, 50/Pack (356838557I)~#|#~15A7B429-AAAF-46EC-84149C411E76B846_sc7
JAM Paper Self Seal #6 Coin Business Envelopes, 3 3/8" x 6", White, 50/Pack (356838557I) is Out of stock
Item: 24557865
Model: 356838557I
No reviews yet
Price is $15.39
Unit of measure 50/Pack
LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Natural, 500/BX~#|#~m000161374_sc7
LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Natural, 500/BX is Out of stock
Item: 513623
Model: 4860-NPC-500
No reviews yet
Price is $89.59
Unit of measure 500/Box
LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Sunflower (EX4880-12-250)~#|#~m005902328_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Sunflower (EX4880-12-250)~#|#~m005823974_sc7
LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 250/Box, Sunflower (EX4880-12-250) is Out of stock
Item: 386613
Model: EX4880-12-250
No reviews yet
Price is $94.29
Unit of measure 250/Box
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.