JAM Paper A9 Foil Lined Invitation Envelopes, 5.75 x 8.75, White with Red Foil, 25/Pack (76798)~#|#~m003904630_sc7JAM Paper A9 Foil Lined Invitation Envelopes, 5.75 x 8.75, White with Red Foil, 25/Pack (76798)~#|#~m003904629_sc7
Item: 262767
Model: 76798
Price is $20.49
Unit of measure 25/Pack
Delivery by Mon, Dec 29
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JAM Paper A10 Invitation Envelope, 6 1/2" x 9 1/2", White, 100/Pack (12039C)~#|#~sp115352023_sc7JAM Paper A10 Invitation Envelope, 6 1/2" x 9 1/2", White, 100/Pack (12039C)~#|#~sp115352019_sc7
Item: 2103320
Model: 12039C
Price is $31.29
Unit of measure 100/Pack
Delivery by Mon, Dec 29
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LUX 6 1/2 x 9 1/2 Open End Envelopes 50/Pack, 24lb. Bright White (1941-50)~#|#~sp14807489_sc7
Item: 24260831
Model: 1941-50
Price is $50.79
Unit of measure 50/Pack
Free delivery by Fri, Jan 02
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LUX #10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2) 50/Pack, Pool (LUX-4860-102-50)~#|#~sp14807463_sc7
Item: 24260625
Model: LUX-4860-102-50
No reviews yet
Price is $25.19
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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Quality Park Survivor Tyvek Self Seal Inter-Departmental Envelope 9" x 12", White, 100/Box (QUAR2400)~#|#~sp44488061_sc7Quality Park Survivor Tyvek Self Seal Inter-Departmental Envelope 9" x 12", White, 100/Box (QUAR2400)~#|#~sp44488060_sc7
Item: 70510
Model: QUAR2400
Price is $274.99
Unit of measure 100/Box
Free delivery by Tue, Dec 23
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JAM Paper A2 Foil Lined Invitation Envelopes, 4.375 x 5.75, White with Red Foil, Bulk 250/Box (72158H)~#|#~m003904622_sc7JAM Paper A2 Foil Lined Invitation Envelopes, 4.375 x 5.75, White with Red Foil, Bulk 250/Box (72158H)~#|#~m003904621_sc7
Item: 1589099
Model: 72158H
No reviews yet
Price is $69.89
Unit of measure 250/Box
Free delivery by Mon, Dec 29
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LUX 80lbs. 5 3/4" x 8 3/4" A9 Invitation Envelopes W/Peel & Press, Wisteria Purple, 250/BX~#|#~m000082193_sc7
Item: 388681
Model: LUX-4895-106-25
No reviews yet
Price is $91.49
Unit of measure 250/Box
Free delivery by Fri, Jan 02
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JAM Paper 9 x 12 Open End Catalog Translucent Vellum Envelopes, Clear, 50/Pack (2851376i)~#|#~sp11854823_sc7
Item: 24141970
Model: 2851376I
No reviews yet
Price is $63.49
Unit of measure 50/Pack
Free delivery by Mon, Dec 29
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JAM Paper A6 Colored Invitation Envelopes, 4.75 x 6.5, Sea Blue Recycled, 25/Pack (15903)~#|#~sp129636640_sc7JAM Paper A6 Colored Invitation Envelopes, 4.75 x 6.5, Sea Blue Recycled, 25/Pack (15903)~#|#~sp129636639_sc7
Item: 263903
Model: 15903
Price is $11.49
Unit of measure 25/Pack
Delivery by Mon, Dec 29
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JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Navy Blue, Bulk 250/Box (LEBA667H)~#|#~m003905156_sc7JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Navy Blue, Bulk 250/Box (LEBA667H)~#|#~m003905155_sc7
Item: 1589016
Model: LEBA667H
No reviews yet
Price is $89.99
Unit of measure 250/Box
Free delivery by Mon, Dec 29
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Lux Window Envelopes, Navy 6 x 9 inch 50/Pack~#|#~m002084638_sc7
Item: 1559161
Model: FFW-69-103-50
No reviews yet
Price is $69.09
Free delivery by Fri, Jan 02
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JAM Paper A2 Parchment Invitation Envelopes, 4.375 x 5.75, Natural Recycled, Bulk 250/Box (34777H)~#|#~m007049410_sc7JAM Paper A2 Parchment Invitation Envelopes, 4.375 x 5.75, Natural Recycled, Bulk 250/Box (34777H)~#|#~m007049409_sc7
Item: 1589330
Model: 34777H
No reviews yet
Price is $78.99
Unit of measure 250/Box
Free delivery by Mon, Dec 29
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Rose Quartz Metallic (5365-04-50)~#|#~m000081732_sc7
Item: 282396
Model: 5365-04-50
No reviews yet
Price is $23.59
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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LUX  4 x 6 3/8 Kraft Open End - 32lb. Brown Kraft 250/Pack, 32lb. Brown Kraft (WS-5504-250)~#|#~sp5822112_sc7LUX  4 x 6 3/8 Kraft Open End - 32lb. Brown Kraft 250/Pack, 32lb. Brown Kraft (WS-5504-250)~#|#~sp5874368_sc7
Item: 23996372
Model: WS-5504-250
No reviews yet
Price is $74.99
Unit of measure 250/Pack
Free delivery by Fri, Jan 02
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Over 30
JAM Paper 4Bar A1 Translucent Vellum Envelopes, 3.625 x 5.125, Platinum Silver, 50/Pack (1591590I)~#|#~m004671927_sc7JAM Paper 4Bar A1 Translucent Vellum Envelopes, 3.625 x 5.125, Platinum Silver, 50/Pack (1591590I)~#|#~m004671926_sc7
Item: 1588800
Model: 1591590I
No reviews yet
Price is $58.99
Unit of measure 50/Pack
Free delivery by Mon, Dec 29
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JAM Paper Square Envelopes, Peel & Press, 3 1/4 x 3 1/4, Black Linen, 250 Pack (8503-BLI-250)~#|#~sp228873250_sc7
Item: 24578286
Model: 8503-BLI-250
No reviews yet
Price is $50.69
Unit of measure 250/Pack
Free delivery by Mon, Dec 29
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Over 30
JAM Paper #10 Business Envelopes, 4.125 x 9.5, Navy Blue, Bulk 500/Box (LEBA367H)~#|#~m003905150_sc7JAM Paper #10 Business Envelopes, 4.125 x 9.5, Navy Blue, Bulk 500/Box (LEBA367H)~#|#~m003905149_sc7
Item: 1589703
Model: LEBA367H
No reviews yet
Price is $122.99
Unit of measure 500/Box
Free delivery by Mon, Dec 29
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 50/Box, Amethyst Metallic (5365-17-50)~#|#~m000081682_sc7
Item: 282343
Model: 5365-17-50
No reviews yet
Price is $14.69
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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JAM Paper A6 Parchment Invitation Envelopes, 4.75 x 6.5, Natural Recycled, 50/Pack (34926I)~#|#~sp137086009_sc7
Item: 1588905
Model: 34926I
No reviews yet
Price is $20.49
Unit of measure 50/Pack
Delivery by Mon, Dec 29
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LUX Peel & Seel Self Seal #10 Invitation Envelope, 4 1/2" x 9 1/2", White, 50/Pack  (4860-80W-50)~#|#~sp14807425_sc7
Item: 24260353
Model: 4860-80W-50
Price is $39.79
Unit of measure 50/Pack
Free delivery by Fri, Jan 02
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LUX A10 Invitation Envelopes (6 x 9 1/2) 50/Box, Midnight Black (F-4590-B-50)~#|#~m000081720_sc7
Item: 282419
Model: F-4590-B-50
No reviews yet
Price is $30.29
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 250/Box, Quartz Metallic (5365-08-250)~#|#~1D521796-EDB3-4EE0-9B854A228DA4CC19_sc7LUX A1 Invitation Envelopes (3 5/8 x 5 1/8) 250/Box, Quartz Metallic (5365-08-250)~#|#~A2F6EA33-59B7-4B7C-9E069FD153B2B86C_sc7
Item: 385068
Model: 5365-08-250
No reviews yet
Price is $68.69
Unit of measure 250/Box
Free delivery by Fri, Jan 02
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LUX 9 x 12 Booklet Envelopes 50/Pack, White w/Security Tint (49783-50)~#|#~sp14807495_sc7
Item: 24260735
Model: 49783-50
Price is $30.69
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Red Recycled, 25/Pack (356730551)~#|#~m003757873_sc7JAM Paper #5.5 Coin Business Colored Envelopes, 3.125 x 5.5, Red Recycled, 25/Pack (356730551)~#|#~m003562853_sc7
Item: 2103449
Model: 356730551
No reviews yet
Price is $11.49
Unit of measure 25/Pack
Delivery by Mon, Dec 29
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JAM Paper A7 Metallic Invitation Envelopes, 5.25 x 7.25, Stardream Silver, 25/Pack (GCST709)~#|#~sp123307916_sc7JAM Paper A7 Metallic Invitation Envelopes, 5.25 x 7.25, Stardream Silver, 25/Pack (GCST709)~#|#~sp123307915_sc7
Item: 261988
Model: GCST709
Price is $29.89
Unit of measure 25/Pack
Delivery by Mon, Dec 29
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JAM Paper Plastic Envelopes with Button and String Tie Closure, Index Booklet, 5.5 x 7.5, Purple, 12/Pack (920B1PU)~#|#~sp73451318_sc7JAM Paper Plastic Envelopes with Button and String Tie Closure, Index Booklet, 5.5 x 7.5, Purple, 12/Pack (920B1PU)~#|#~sp73451324_sc7
Item: 1589498
Model: 920B1PU
No reviews yet
Price is $28.19
Unit of measure 12/Pack
Delivery by Mon, Dec 29
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JAM Paper A9 Invitation Envelopes, 5.75 x 8.75, Teal, 50/Pack (157463I)~#|#~m003904716_sc7JAM Paper A9 Invitation Envelopes, 5.75 x 8.75, Teal, 50/Pack (157463I)~#|#~m003904715_sc7
Item: 1588714
Model: 157463I
No reviews yet
Price is $32.29
Unit of measure 50/Pack
Delivery by Mon, Dec 29
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JAM Paper 6 x 6 Square Invitation Envelopes, White, 50/Pack (28416I)~#|#~sp126919273_sc7JAM Paper 6 x 6 Square Invitation Envelopes, White, 50/Pack (28416I)~#|#~sp126919272_sc7
Item: 1588509
Model: 28416I
Price is $44.19
Unit of measure 50/Pack
Free delivery by Mon, Dec 29
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JAM Paper #10 Business Envelope, 4 1/8" x 9 1/2", Black, 25/Pack (2112730)~#|#~sp4800439_sc7
Item: 2633155
Model: 2112730
No reviews yet
Price is $19.49
Unit of measure 25/Pack
Delivery by Mon, Dec 29
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LUX 4 1/8" x 9 1/2" #10 80lbs. Open End Envelopes, Pool Blue, 50/Pack~#|#~m000081280_sc7
Item: 281891
Model: LUX-7716-102-50
Price is $53.69
Unit of measure 50/Pack
Free delivery by Fri, Jan 02
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LUX 4 3/8" x 5 3/4" 70lbs. A2 Invitation Envelopes W/Glue, Candy Pink, 50/Pack~#|#~m000081773_sc7
Item: 282441
Model: EX4870-14-50
Price is $20.69
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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Over 30
LUX 80lb 5 3/4"x8 3/4" A9 Invitation Envelopes W/Peel&Press, Midnight Black, 500/BX~#|#~m000081720_sc7
Item: 514099
Model: F-4595-B-500
No reviews yet
Price is $117.79
Free delivery by Fri, Jan 02
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LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 1000/BX (7535-1000)~#|#~DB7F205D-9E6A-46E0-8491E1C84AEFDB14_sc7LUX 80lbs. 4 1/8" x 9 1/2" #10 Open End Envelopes, Bright White, 1000/BX (7535-1000)~#|#~22EEA5ED-E9AD-40AE-B3AF07777DC2DF1A_sc7
Item: 385671
Model: 7535-1000
No reviews yet
Price is $215.59
Unit of measure 1000/Box
Free delivery by Fri, Jan 02
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Over 30
LUX 7 1/4" x 5 1/4" 70lbs. Postage Saver Envelopes W/Peel & Press, Bright White, 50/Pack~#|#~m000081518_sc7LUX 7 1/4" x 5 1/4" 70lbs. Postage Saver Envelopes W/Peel & Press, Bright White, 50/Pack~#|#~43964C72-4044-4051-8F8454F3C85A2194_sc7
Item: 282149
Model: 55PS-W-50
No reviews yet
Price is $22.59
Unit of measure 50/Pack
Delivery by Fri, Jan 02
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Over 30
LUX 70lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Grocery Bag Brown, 500/BX~#|#~m004940396_sc7LUX 70lb 4 1/8"x9 1/2" Square Flap #10 Envelopes, Grocery Bag Brown, 500/BX~#|#~m005823987_sc7
Item: 516499
Model: 4860-GB-500
No reviews yet
Price is $111.19
Free delivery by Fri, Jan 02
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JAM Paper #10 Business Envelope 4 1/8" x 9 1/2", Dark Green, 25/Pack (21514959)~#|#~A39DBCEE-6D8E-406C-BAB9041C11DCCE40_sc7JAM Paper #10 Business Envelope 4 1/8" x 9 1/2", Dark Green, 25/Pack (21514959)~#|#~5A98AEEA-DBF2-495F-8F0DBF4444796919_sc7
Item: 2633063
Model: 21514959
Price is $18.89
Unit of measure 25/Pack
Delivery by Mon, Dec 29
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JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Dark Green, 50/Pack (3157346i)~#|#~9B87BCF9-65E8-44D1-B0E417879A6F1B42_sc7JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Dark Green, 50/Pack (3157346i)~#|#~6149DBE4-86CC-4BCA-B632D53128134229_sc7
JAM Paper A6 Invitation Envelopes, 4.75 x 6.5, Dark Green, 50/Pack (3157346i) is Out of stock
Item: 2478062
Model: 3157346I
No reviews yet
Price is $23.29
Unit of measure 50/Pack
LUX 5.5" x 8.5" Kraft Open End - 24lb. Brown Kraft 50/Pack, 24lb. Brown Kraft (WS-4584-50)~#|#~B448E156-2AB9-42D4-B27E023CED6F0F50_sc7LUX 5.5" x 8.5" Kraft Open End - 24lb. Brown Kraft 50/Pack, 24lb. Brown Kraft (WS-4584-50)~#|#~80C58C37-45E6-467E-A9AF313EC314AE4A_sc7
LUX 5.5" x 8.5" Kraft Open End - 24lb. Brown Kraft 50/Pack, 24lb. Brown Kraft (WS-4584-50) is Out of stock
Item: 23995479
Model: WS-4584-50
No reviews yet
Price is $43.09
Unit of measure 50/Pack
Quality Park Redi-Seal Kraft Catalog Envelope, 9 1/2" x 12 1/2", Kraft, 100/Box (43667)~#|#~s0293005_sc7Quality Park Redi-Seal Kraft Catalog Envelope, 9 1/2" x 12 1/2", Kraft, 100/Box (43667)~#|#~s0171353_sc7
Quality Park Redi-Seal Kraft Catalog Envelope, 9 1/2" x 12 1/2", Kraft, 100/Box (43667) is Out of stock
Item: 813431
Model: QUA43667
Unit of measure 100/Box
JAM Paper A2 Invitation Envelope 4 3/8" x 5 3/4", Presidential Blue, 25/Pack (563913396)~#|#~533A953B-4BEF-42BE-9568CF0F89AAF5B8_sc7JAM Paper A2 Invitation Envelope 4 3/8" x 5 3/4", Presidential Blue, 25/Pack (563913396)~#|#~C0571050-9254-42C1-82F7C18BE1C63560_sc7
JAM Paper A2 Invitation Envelope 4 3/8" x 5 3/4", Presidential Blue, 25/Pack (563913396) is Out of stock
Item: 261128
Model: 563913396
No reviews yet
Price is $14.29
Unit of measure 25/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.