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LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Crystal Metallic, 50/Pack~#|#~m004940428_sc7LUX 4 1/8" x 9 1/2" #10 80lbs. Square Flap Envelopes, Crystal Metallic, 50/Pack~#|#~m005823906_sc7
Item: 281920
Model: 5360-30-50
No reviews yet
Price is $40.09
Unit of measure 50/Pack
Free delivery by Wed, Feb 18
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JAM Paper 5.5 x 7.5 Foil Envelopes with Zip Closure, Gold, 25/Pack (1417050)~#|#~sp20131834_sc7
Item: 24295167
Model: 1417050
No reviews yet
Price is $33.99
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX A10 Invitation Envelopes (6 x 9 1/2) 50/Pack, Blonde Metallic (4590-M07-50)~#|#~sp12274947_sc7LUX A10 Invitation Envelopes (6 x 9 1/2) 50/Pack, Blonde Metallic (4590-M07-50)~#|#~sp14081669_sc7
Item: 24216235
Model: 4590-M07-50
No reviews yet
Price is $33.59
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 50 Pack (4860-SG-50)~#|#~sp226423802_sc7JAM Paper Self Seal Business Envelope, 4 1/8 x 9 1/2, Cotton Gray, 50 Pack (4860-SG-50)~#|#~sp226423801_sc7
Item: 24578396
Model: 4860-SG-50
No reviews yet
Price is $25.49
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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LUX A4 Invitation Envelopes (4 1/4 x 6 1/4) 50/Pack, Champagne Metallic (4872-M08-50)~#|#~sp14807720_sc7
Item: 24260828
Model: 4872-M08-50
No reviews yet
Price is $14.29
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper 6.25 x 7.875 Open End Foil Envelopes with Self-Adhesive Closure, Gold, 25/Pack (1323273)~#|#~m000067467_sc7
Item: 260886
Model: 1323273
No reviews yet
Price is $33.99
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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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 A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Copper Metallic (5365-11-50)~#|#~m000081698_sc7
Item: 282360
Model: 5365-11-50
No reviews yet
Price is $18.09
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper A7 Foil Lined Invitation Envelopes, 5.25 x 7.25, Black Linen with Silver Foil, 25/Pack (3243688)~#|#~m002934337_sc7JAM Paper A7 Foil Lined Invitation Envelopes, 5.25 x 7.25, Black Linen with Silver Foil, 25/Pack (3243688)~#|#~sp137085792_sc7
Item: 262743
Model: 3243688
Price is $18.99
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX 80lb 4 1/8"x9 1/2" Square Flap #10 Envelopes W/Peel&Press, Seafoam Blue, 500/BX~#|#~m005824022_sc7
Item: 517493
Model: LUX-4860-113500
No reviews yet
Price is $98.79
Free delivery by Wed, Feb 18
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LUX 5 x 5 Square Envelopes, 500/Box, Citrus (8505-20-500)~#|#~m000081523_sc7
Item: 514942
Model: 8505-20-500
No reviews yet
Price is $120.35
Free delivery by Wed, Feb 18
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Smoke Gray, 250/BX~#|#~m004940462_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Square Flap Envelopes, Smoke Gray, 250/BX~#|#~m005824005_sc7
Item: 386342
Model: EX4860-22-250
No reviews yet
Price is $54.59
Unit of measure 250/Box
Free delivery by Wed, Feb 18
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LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Wasabi (FE4280-22-1000)~#|#~m005902341_sc7LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) 1000/Box, Wasabi (FE4280-22-1000)~#|#~m005823981_sc7
Item: 387849
Model: FE4280-22-1000
No reviews yet
Price is $156.70
Unit of measure 1000/Box
Free delivery by Wed, Feb 18
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JAM Paper 6 x 6 Square Colored Invitation Envelopes, Green Recycled, 50/Pack (2792267I)~#|#~m003904795_sc7JAM Paper 6 x 6 Square Colored Invitation Envelopes, Green Recycled, 50/Pack (2792267I)~#|#~m003904794_sc7
Item: 1588518
Model: 2792267I
No reviews yet
Price is $49.99
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Ultra Fuchsia Pink, 50/Pack (356730545I)~#|#~sp115352069_sc7JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Ultra Fuchsia Pink, 50/Pack (356730545I)~#|#~sp115352067_sc7
Item: 2329356
Model: 356730545I
No reviews yet
Price is $18.39
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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JAM Paper 8.5 x 8.5 Square Strathmore Invitation Envelopes, Bright White Wove, 50/Pack (900858534i)~#|#~m007162596_sc7JAM Paper 8.5 x 8.5 Square Strathmore Invitation Envelopes, Bright White Wove, 50/Pack (900858534i)~#|#~m007162595_sc7
Item: 24006146
Model: 900858534I
No reviews yet
Price is $56.39
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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LUX 4 3/8" x 5 3/4" 80lbs. A2 Invitation Envelopes W/Glue, Aquamarine Metallic, 50/Pack~#|#~m000081684_sc7
Item: 282430
Model: 5370-02-50
No reviews yet
Price is $18.95
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper 4Bar A1 Colored Invitation Envelopes, 3.625 x 5.125, Red Recycled, 25/Pack (900927182)~#|#~m002934111_sc7JAM Paper 4Bar A1 Colored Invitation Envelopes, 3.625 x 5.125, Red Recycled, 25/Pack (900927182)~#|#~m002934110_sc7
Item: 260826
Model: 900927182
Price is $11.49
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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LUX A2 (4 3/8 x 5 3/4) 50/Box, Holiday Red (FE4270-15-50)~#|#~m000081790_sc7
Item: 282463
Model: FE4270-15-50
No reviews yet
Price is $20.59
Unit of measure 50/Pack
Delivery by Wed, Feb 18
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JAM Paper 9 x 9 Square Invitation Envelopes, White, 100/Pack (4232B)~#|#~sp115352016_sc7JAM Paper 9 x 9 Square Invitation Envelopes, White, 100/Pack (4232B)~#|#~sp115352015_sc7
Item: 261327
Model: 4232B
No reviews yet
Price is $53.19
Unit of measure 100/Box
Free delivery by Mon, Feb 16
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JAM Paper A2 Invitation Envelopes, 4.375 x 5.75, Baby Pink, 50/Pack (155623I)~#|#~sp132864308_sc7JAM Paper A2 Invitation Envelopes, 4.375 x 5.75, Baby Pink, 50/Pack (155623I)~#|#~sp132864307_sc7
Item: 1589472
Model: 155623I
Price is $22.19
Unit of measure 50/Pack
Delivery by Mon, Feb 16
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LUX 60lbs. 4 1/8" x 9 1/2" #10 Business Envelopes, White With Silver LUX Lining, 250/BX~#|#~m000081264_sc7
Item: 387906
Model: FLWH4260-03-250
No reviews yet
Price is $66.29
Unit of measure 250/Box
Free delivery by Wed, Feb 18
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LUX 9 x 12 Open End Envelopes, 250/Box, Gold Metallic (4894-07-250)~#|#~m001149712_sc7
Item: 1028617
Model: 4894-07-250
No reviews yet
Price is $201.99
Free delivery by Wed, Feb 18
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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 Mon, Feb 16
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LUX 6" x 9" Open End Clasp Envelopes, Midnight Black, 100/Pack (87915-50)~#|#~42AE1419-DD74-49E4-BC409BD28F387D60_sc7
Item: 282275
Model: 87915-100
Price is $96.79
Unit of measure 100/Pack
Free delivery by Wed, Feb 18
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JAM Paper A8 Invitation Envelopes, 5.5 x 8.125, Baby Blue, 25/Pack (155630)~#|#~m003904710_sc7JAM Paper A8 Invitation Envelopes, 5.5 x 8.125, Baby Blue, 25/Pack (155630)~#|#~m003904709_sc7
Item: 261358
Model: 155630
No reviews yet
Price is $16.19
Unit of measure 25/Pack
Delivery by Mon, Feb 16
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JAM Paper 9 x 9 Square Invitation Envelopes, White, 50/Pack (4232I)~#|#~sp115352016_sc7JAM Paper 9 x 9 Square Invitation Envelopes, White, 50/Pack (4232I)~#|#~sp115352015_sc7
Item: 1588501
Model: 4232I
Price is $44.19
Unit of measure 50/Pack
Free delivery by Mon, Feb 16
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JAM Paper A6 Translucent Vellum Invitation Envelopes, 4.75 x 6.5, Clear, 25/Pack (13756)~#|#~sp123307992_sc7JAM Paper A6 Translucent Vellum Invitation Envelopes, 4.75 x 6.5, Clear, 25/Pack (13756)~#|#~sp123307991_sc7
Item: 263974
Model: 13756
No reviews yet
Price is $20.49
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, Gold Metallic (5375-07-50)~#|#~m000081706_sc7
LUX A6 Invitation Envelopes (4 3/4 x 6 1/2) 50/Box, Gold Metallic (5375-07-50) is Out of stock
Item: 282611
Model: 5375-07-50
Price is $18.99
Unit of measure 50/Pack
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.