Sponsored Products
Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50312-CC)~#|#~s1223633_sc7
Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50312-CC)~#|#~s1223639_sc7
13% off of Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50312-CC)
Item # : 787385
Model # : ST50312-CC
Keep mailings confidential with these Staples EasyClose security-tint #10 white envelopes, which feature a unique interior pattern to help prevent information theft.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. paper for durability
Price is $24.99, Regular price was $28.79, You save 13%
Unit of measure 500/Box Price per unit $0.05/Envelope
Next-Day Delivery by tomorrow
 in Leesburg
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Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (ST50308-CC)~#|#~04BF5D88-0DCB-4C46-8A97D67F61C726B8_sc7
Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (ST50308-CC)~#|#~F7FF46B5-6BB8-466E-99786E7BF515AACC_sc7
Item # : 394057
Model # : ST50308-CC
Keep third parties from reading sensitive information by using this 100-pack of Staples easy-close #10 security-tint envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. paper for durability
Price is $10.29
Unit of measure 100/Box Price per unit $0.10/Envelope
Next-Day Delivery by tomorrow
 in Leesburg
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Staples Self Seal Self Seal Security Tinted #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST511290-CC)~#|#~3C6C3501-036D-49CE-A69A970133C22FF3_sc7
Staples Self Seal Self Seal Security Tinted #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST511290-CC)~#|#~DBBE4E7B-D4BC-4869-B678429B980A6E2D_sc7
15% off of Staples Self Seal Self Seal Security Tinted #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST511290-CC)
Item # : 511290
Model # : ST511290-CC
Send checks, invoices and other sensitive documents with these Staples #10 left-window security tint self-sealing envelopes.
  • Envelopes are suitable for all your mailing needs
  • Made from 24 lbs. white wove paper for durability
Price is $24.99, Regular price was $29.49, You save 15%
Unit of measure 500/Box Price per unit $0.05/Envelope
Next-Day Delivery by tomorrow
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Staples #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50301-CC)~#|#~FB3B930A-0912-433C-8C98F4CBCC197392_sc7
Staples #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50301-CC)~#|#~10537A48-505B-4914-BBD96AEB2E3575E9_sc7
Item # : 187013
Model # : ST50301-CC
Prepare documents for mailing with these Staples white #10 gummed envelopes.
  • PACKAGING MAY VARY, SAME GREAT PRODUCT.
  • US #10 business envelopes are suitable for many mailing projects
Price is $20.49
Unit of measure 500/Box Price per unit $0.04/Envelope
Next-Day Delivery by tomorrow
 in Leesburg
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Mead Security Tinted #10 Business Envelopes, 4-1/8" x 9-1/2", White, 40/Pack (75214)~#|#~sp130849571_sc7
Mead Security Tinted #10 Business Envelopes, 4-1/8" x 9-1/2", White, 40/Pack (75214)~#|#~sp130849569_sc7
Mead Security Tinted #10 Business Envelopes, 4-1/8" x 9-1/2", White, 40/Pack (75214) is Clearance
52% off of Mead Security Tinted #10 Business Envelopes, 4-1/8" x 9-1/2", White, 40/Pack (75214)
Item # : 300053
Model # : 75214
  • 4 1/8" x 9 1/2"
  • White paper envelopes
Price is $1.49, Regular price was $3.15, You save 52%
Unit of measure 40/Pack
Next-Day Delivery by tomorrow
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Staples Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50302-CC)~#|#~DA5D596D-5974-4D63-A0CB649D25EA95D4_sc7
Staples Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50302-CC)~#|#~8A08070E-2CC5-4140-95320C7211E7CD89_sc7
14% off of Staples Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50302-CC)
Item # : 200519
Model # : ST50302-CC
Staples gummed security tint #10 4-1/8 x 9-1/2-inch white envelopes boast a plain white design, making it easy to customize each envelope with mailing labels.
  • PACKAGING MAY VARY, SAME GREAT PRODUCT.
  • US #10 business envelopes are suitable for many mailing projects
Price is $22.99, Regular price was $26.89, You save 14%
Unit of measure 500/Box Price per unit $0.05/Envelope
Next-Day Delivery by tomorrow
 in Leesburg
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Staples Self Seal Self Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST28730-CC)~#|#~C1DE4A05-5BF1-4CB6-AF706FC6A1C4D67B_sc7
Staples Self Seal Self Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST28730-CC)~#|#~22F7C042-EEBE-4C34-8AC6CCDCE93451D7_sc7
14% off of Staples Self Seal Self Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST28730-CC)
Item # : 1775862
Model # : ST28730-CC
Mail all your business correspondence with this 500-count box of self-sealing Staples security-tinted double-window envelopes.
  • Pressure Sensitive Adhesive
  • #10 business envelopes are suitable for all your mailing needs
Price is $29.99, Regular price was $34.99, You save 14%
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
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Staples Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST20137)~#|#~AE1BB140-9743-4C67-BBE1972255DDD93E_sc7
Staples Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST20137)~#|#~91389021-99C1-4B5E-AB395FCAE6404667_sc7
Item # : 892095
Model # : ST20137
#10 double-window security-tint gummed envelopes feature generously sized recipient and sender windows, making addresses easy to scan and read.
  • PACKAGING MAY VARY, SAME GREAT PRODUCT.
  • US #10 business envelopes are suitable for many mailing projects
Price is $32.49
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
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Quality Park Redi-Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (QUA24559)~#|#~sp41689016_sc7
Quality Park Redi-Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", White, 500/Box (QUA24559)~#|#~sp41689015_sc7
Item # : 886849
Model # : QUA24559
Keep invoices, contracts and other sensitive information private with this box of 500 Quality Park Redi-Seal double-window security-tint #10 envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. wove paper for durability
Price is $96.99
Unit of measure 500/Box Price per unit $0.19/Envelope
Free Next-Day eligible by tomorrow
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Mead Press It Seal It #10 Security Envelopes, 4 1/8" x 9 1/2", White, 45/Pack (MEA75026)~#|#~m007116469_sc7
Item # : 2696277
Model # : 75026
  • Security Envelope. All purpose for home and office
  • White. Made from sheets of paper. Paper weight 20lbs
Price is $6.09
Unit of measure 45/Pack
Next-Day Delivery by tomorrow
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Staples Security Tinted #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST50152-CC)~#|#~A5800229-44DF-4C15-94D8DE9579D38472_sc7
Staples Security Tinted #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST50152-CC)~#|#~5DE37CBF-6992-4DE5-B92473C21A89EF98_sc7
15% off of Staples Security Tinted #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST50152-CC)
Item # : 918161
Model # : ST50152-CC
Send out confidential correspondence securely with these #10 gummed left-window security-tint envelopes.
  • PACKAGING MAY VARY, SAME GREAT PRODUCT.
  • Envelopes are great for mailing letters and documents
Price is $29.99, Regular price was $35.39, You save 15%
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
1-hr pickup
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Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (50306)~#|#~s1223617_sc7
Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (50306)~#|#~s1223598_sc7
Item # : 381912
Model # : ST50306-CC
Help papers stay clean and safe while in transit with this 500-pack of Staples EasyClose 4-1/8 x 9-1/2-inch white #10 envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. paper for durability
Price is $31.39
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
 in Leesburg
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Simply QuickStrip Self Seal Security Tinted #10 Envelope, 4 1/8" x 9 1/2", White, 25/Pack (74049)~#|#~s1102019_sc7
Simply QuickStrip Self Seal Security Tinted #10 Envelope, 4 1/8" x 9 1/2", White, 25/Pack (74049)~#|#~s1102018_sc7
Item # : 862858
Model # : 74049
Simply #10 envelopes feature QuickStrip closure for effortless use and a secure seal
  • #10 envelopes cover both your home and business mailing needs
  • White 20 lb. woven white paper with security tint to ensure privacy and confidentiality
Price is $3.79
Unit of measure 25/Pack
Delivery by Thu, Jul 17
 in Leesburg
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Staples #10 1/2 Kraft Catalog Envelope, 9" x 12", Kraft, 10/Pack (SPL901988)~#|#~050633DB-B838-45A9-9092A360BC03DB8A_sc7
Staples #10 1/2 Kraft Catalog Envelope, 9" x 12", Kraft, 10/Pack (SPL901988)~#|#~C3F6F090-2C52-4632-9CE10101A4B89CE5_sc7
Staples #10 1/2 Kraft Catalog Envelope, 9" x 12", Kraft, 10/Pack (SPL901988) is In-store only
Item # : 901988
Model # : SPL901988
The Staples 9" x 12" envelope featuring a resealable ClearClasp closure for repeated usage is made of 28-lb brown kraft and has a gummed flap for secure closure.
  • 9" x 12"
  • Two ways to seal: resealable ClearClasp™closure for repeated use and gummed flap for permanent closure
Price is $8.99
Unit of measure 10/Pack
 in Leesburg
Staples Self Seal Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST511289-CC)~#|#~C1DE4A05-5BF1-4CB6-AF706FC6A1C4D67B_sc7
Staples Self Seal Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST511289-CC)~#|#~73F89DCA-30B6-46FA-B098CD35CE9CBEC8_sc7
15% off of Staples Self Seal Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST511289-CC)
Item # : 511289
Model # : ST511289-CC
Easily handle large business mailings with this box of 500 Staples 4.125 x 9.5-inch white self-sealing security-tint envelopes.
  • US #10 business envelopes are suitable for all your mailing needs
  • Made from white 24 lb. paper for durability
Price is $24.99, Regular price was $29.49, You save 15%
Unit of measure 500/Box Price per unit $0.05/Envelope
Next-Day Delivery by tomorrow
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Staples Gummed #10 Envelope, 4-1/8" x 9-1/2", White, 2500/CT (50301)~#|#~FB3B930A-0912-433C-8C98F4CBCC197392_sc7
Staples Gummed #10 Envelope, 4-1/8" x 9-1/2", White, 2500/CT (50301)~#|#~580F8D8E-EB73-497E-8CACEB65C3A80A49_sc7
Item # : 2792358
Model # : 50301
Standard #10 envelopes for correspondence and business or direct mail
  • Standard #10 envelope for correspondence or professional use
  • White, 24-pound paper stock
Price is $99.09
Unit of measure 2500/Carton
Free Next-Day eligible by tomorrow
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Staples QuickStrip EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (ST50307-CC)~#|#~888BE6B1-31CD-47C0-A8C1657439776121_sc7
Staples QuickStrip EasyClose Self Seal #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (ST50307-CC)~#|#~DDE921C8-55FF-44C0-B2C5590B29C8AE44_sc7
Item # : 394053
Model # : ST50307-CC
Make sealing envelopes less of a chore with this 100-pack of Staples EasyClose #10 envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. paper for durability
Price is $7.59
Unit of measure 100/Box Price per unit $0.08/Envelope
Next-Day Delivery by tomorrow
1-hr pickup
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Mead Self Seal #10 Business Envelope 4 1/8" x 9 1/2", White, 50/Pack (75024)~#|#~BE447AF8-7086-425C-BD8A2CBB0ECB5441_sc7
Item # : 24239449
Model # : 75024
  • #10 size envelopes measure 4 1/8" x 9 1/2" for mailing standard letter size documents
  • Mead Press-It Seal-It® envelopes feature a self-adhesive seal
Price is $6.09
Unit of measure 50/Pack
Next-Day Delivery by tomorrow
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Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 25/Box (594410/19001)~#|#~8BE98924-BED3-48EF-B5079EBBDEABF373_sc7
Staples EasyClose #10 Business Envelopes, 4 1/8" x 9 1/2", White, 25/Box (594410/19001)~#|#~C43D0B5D-A276-4A92-B17CF5097E74D5C4_sc7
Item # : 594410
Model # : 50291/594410/19
Staples QuickStrip envelopes feature EasyClose flaps for secure closure
  • Business envelopes ideal for general mailing needs
  • Made of white woven material that makes labeling easier
Price is $6.49
Unit of measure 25/Pack
Delivery by Thu, Jul 17
1-hr pickup
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Quality Park Gummed Brightly Colored Business #10 Envelopes, 4-1/8" x 9-1/2", Red, 25/Pack~#|#~s0171214_sc7
Item # : 507682
Model # : QUA11134
Quality Park Gummed Brightly Colored Business Envelopes are No. 10 business envelopes feature an extra bright red color to get your mail noticed. 60 lb.
  • Business and commercial use
  • Gummed flap
Price is $7.79
Unit of measure 25/Pack
Delivery by Thu, Jul 10
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Mead #10 Business Envelopes, 4-1/8" x 9-1/2", White, 50/Pack (75050)~#|#~sp130850205_sc7
Mead #10 Business Envelopes, 4-1/8" x 9-1/2", White, 50/Pack (75050)~#|#~sp130850204_sc7
Item # : 294470
Model # : 75050
  • 4 1/8" x 9 1/2"
  • White paper envelopes
Price is $5.09
Unit of measure 50/Pack
Next-Day Delivery by tomorrow
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Southworth Linen Business Envelope, #10, 24 lb., Ivory, 50/Pack (P564-10)~#|#~s1174972_sc7
Southworth Linen Business Envelope, #10, 24 lb., Ivory, 50/Pack (P564-10)~#|#~s1174973_sc7
Item # : 418665
Model # : P564-10
Trusted Since 1839. Southworth Business envelopes are an easy replacement of everyday business-size envelopes, with distinctive linen finish and premium paper.
  • #10 envelope for easy use and shipping
  • Linen finish, in ivory 24 lb. envelopes
Price is $28.99
Unit of measure 50/Pack
Delivery by Thu, Jul 17
1-hr pickup
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JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Navy Blue, 50/Pack (LEBA367I)~#|#~m003905150_sc7
JAM Paper Open End #10 Business Envelope, 4 1/8" x 9 1/2", Navy Blue, 50/Pack (LEBA367I)~#|#~m003905149_sc7
Item # : 1588601
Model # : LEBA367I
  • Product Type: Dark Base Envelope
  • Navy blue paper envelopes
Price is $19.99
Unit of measure 50/Pack
Delivery by Tue, Jul 15
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Staples QuickStrip EasyClose Self Seal #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST381936/381936)~#|#~s1226295_sc7
Staples QuickStrip EasyClose Self Seal #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST381936/381936)~#|#~s1223638_sc7
Item # : 381936
Model # : ST381936/381936
Mail invoices or financial statements with this 500-pack of Staples QuickStrip EasyClose 4-1/8 x 9-1/2-inch white left-window #10 envelopes.
  • Envelopes are great for mailing letters and documents
  • Made from 24 lbs. white wove paper for durability
Price is $34.49
Unit of measure 500/Box Price per unit $0.07/Envelope
Next-Day Delivery by tomorrow
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Quality Park Redi-Strip Security Tinted #10 Business Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (90119)~#|#~s1154894_sc7
Quality Park Redi-Strip Security Tinted #10 Business Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (90119)~#|#~s1172752_sc7
Item # : 660932
Model # : QUA90119R
Keep sensitive information safe with this 500-pack of Quality Park security-tinted left-window #10 Redi-Strip® envelopes.
  • US #10 business envelopes with window are suitable for all your mailing needs
  • Made from white wove 24 lb. paper for durability
Price is $88.39
Unit of measure 500/Box Price per unit $0.18/Envelope
Free Next-Day eligible by tomorrow
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Quality Park Clasp & Moistenable Glue Kraft Catalog Envelopes, 9" x 12", Brown Kraft, 100/Box (QUA37890)~#|#~2F953C42-89C8-4065-A51161D0BFF158D6_sc7
Quality Park Clasp & Moistenable Glue Kraft Catalog Envelopes, 9" x 12", Brown Kraft, 100/Box (QUA37890)~#|#~7D738EF6-08D1-4250-8DD91B2F898ED90E_sc7
Item # : 823285
Model # : QUA37890
Ship photos and other important documents safely with this box of 100 Quality Park brown gummed clasp envelopes.
  • Catalog envelopes are a convenient and reliable choice for personal and business mailing purposes
  • Made from brown kraft paper that conceals contents from prying eyes
Price is $26.99
Unit of measure 100/Box
Next-Day Delivery by tomorrow
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Staples #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST50151-CC)~#|#~A585D404-8395-4AA8-8DA22BF660CD9233_sc7
Staples #10 Window Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (ST50151-CC)~#|#~CC8B6986-1619-45AA-BB07FACCB7CE239D_sc7
Item # : 121632
Model # : ST50151-CC
Avoid the trouble of manually addressing envelopes by using this 500-pack of Staples 4.125 x 9.5-inch left-window white #10 envelopes.
  • Standard #10 envelopes are great for mailing letters and documents
  • Made from 24 lbs. white wove paper for durability
Price is $42.79
Unit of measure 500/Box Price per unit $0.09/Envelope
Free Next-Day eligible by tomorrow
 in Leesburg
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Staples Tear-Resistant EasyClose Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (21573)~#|#~9D61BF36-F926-4189-B751F8BE3F66B083_sc7
Staples Tear-Resistant EasyClose Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 100/Box (21573)~#|#~B2C81072-7CD5-46C7-9F58781765042EC9_sc7
Item # : 329841
Model # : ST21573-CC
Enjoy the convenience of easy-sealing envelopes by using these Staples white tear-resistant privacy-tinted #10 business envelopes.
  • US #10 business envelopes are suitable for all your mailing needs
  • Made from white 25 lb. paper for durability
Price is $27.09
Unit of measure 100/Box Price per unit $0.27/Envelope
Next-Day Delivery by tomorrow
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Staples Premium Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (19264VP)~#|#~E65CF8B4-3BE9-446A-BF728FF671907089_sc7
Staples Premium Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (19264VP)~#|#~F348EB53-3B4F-481F-A4AD4778B99026D6_sc7
Item # : 321554
Model # : ST19264VP-CC
Send invitations, notices and other correspondence with this 500-pack of Staples premium white diagonal-seam gummed #10 envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. wove paper for durability
Price is $26.99
Unit of measure 500/Box Price per unit $0.05/Envelope
Next-Day Delivery by tomorrow
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Quality Park Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA90020)~#|#~sp39613174_sc7
Quality Park Gummed #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA90020)~#|#~sp39613173_sc7
Item # : 817218
Model # : QUA90020
Tackle big mailing projects with this box of 500 Quality Park gummed white #10 business envelopes.
  • US #10 business envelopes are suitable for all your mailing needs
  • Made from white 24 lb. paper for durability
Price is $32.39
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
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Quality Park Reveal-N-Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White Wove, 500/Box (QUA67218)~#|#~sp40319157_sc7
Item # : 717361
Model # : QUA67218
Keep important papers safe with this 500-pack of Quality Park Reveal-N-Seal self-seal #10 security business envelopes.
  • US #10 business envelopes are suitable for many mailing projects
  • Made from white wove 24 lb. paper for durability
Price is $104.59
Unit of measure 500/Box Price per unit $0.21/Envelope
Free Next-Day eligible by tomorrow
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Discover the magic of #10 envelopes for daily use

Number 10 envelopes, often referred to as "#10 envelopes," are instrumental office supplies for various tasks. Typically used to send invoices, checks, letters, and other documents, these envelopes offer a great solution for mailing business or personal correspondences securely. Their standard size (4 1/8 inches by 9 1/2 inches) makes them an ideal fit for most letter-sized papers, which can easily be folded into thirds. These #10 envelopes not only help keep your documents intact but also deliver a touch of professionalism and speedy organization.

Explore the variety and options in #10 envelopes

Number 10 envelopes come in a wide array of colors, materials, and design options. They are available in versatile finishes like glossy, matte or textured, which can be selected based on personal preferences or business needs. You can also find these envelopes with or without windows, providing the flexibility to display the mailing address directly. Many companies even offer custom-printed number 10 envelopes, giving you the chance to showcase your brand's logo or design. In addition to number 10 envelopes, it's worth mentioning smaller sized Envelopes like A7 or A2 which are commonly used for invitations and greeting cards.