Sponsored Products
Staples Self Seal Self Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST28731-CC)~#|#~C1DE4A05-5BF1-4CB6-AF706FC6A1C4D67B_sc7Staples Self Seal Self Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST28731-CC)~#|#~F5441B5F-2F28-4D45-BEE05F26392EE091_sc7
14% off of Staples Self Seal Self Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST28731-CC)
Item: 1775861
Model: ST28731-CC
Price is $29.99Regular price was $34.99, You save 14%
Unit of measure 500/Box Price per unit $0.06/Envelope
Delivery by Wed, Apr 23
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Staples Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST266759-CC)~#|#~CA8F9A39-0429-4A16-A4C553898A110D20_sc7Staples Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST266759-CC)~#|#~FD84E347-9FA6-446D-AEC7787B89913917_sc7
17% off of Staples Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST266759-CC)
Item: 266759
Model: ST266759-CC
Price is $24.99Regular price was $30.39, You save 17%
Unit of measure 500/Box Price per unit $0.05/Envelope
Delivery by Wed, Apr 23
1-hr pickup
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Quality Park Reveal-N-Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White Wove, 500/Box (QUA67529)~#|#~sp40319149_sc7Quality Park Reveal-N-Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White Wove, 500/Box (QUA67529)~#|#~sp40319148_sc7
Item: 717358
Model: QUA67529
Price is $105.09
Unit of measure 500/Box
Free delivery by Wed, Apr 23
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Staples EasyClose #9 Business Envelopes, 3 7/8" x 8 7/8", White, 500/Box (570235N)~#|#~s1223618_sc7Staples EasyClose #9 Business Envelopes, 3 7/8" x 8 7/8", White, 500/Box (570235N)~#|#~s1223622_sc7
Item: 570235
Model: ST570235N-CC
Price is $34.09
Unit of measure 500/Box Price per unit $0.07/Envelope
Delivery by Wed, Apr 23
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Staples Gummed #9 Business Envelopes, 3 7/8" x 8 7/8", White, 500/Box (247650/19255)~#|#~2DC4606D-A87A-476A-839102710C372D81_sc7Staples Gummed #9 Business Envelopes, 3 7/8" x 8 7/8", White, 500/Box (247650/19255)~#|#~74592157-827E-4046-AEF156ABA2B07D1F_sc7
Item: 247650
Model: ST247650-CC
Price is $32.39
Unit of measure 500/Box Price per unit $0.06/Envelope
Delivery by Wed, Apr 23
1-hr pickup
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Staples Gummed #9 Business Envelope, 3 7/8" x 8 7/8", White Wove, 500/Box (351470N)~#|#~7A7DF31B-8D92-4DEF-BB60E63DB1E5B414_sc7Staples Gummed #9 Business Envelope, 3 7/8" x 8 7/8", White Wove, 500/Box (351470N)~#|#~1DFD0707-F05E-4E82-8D4EFAAA70CB311B_sc7
Item: 351470
Model: ST351470N-CC
Price is $36.09
Unit of measure 500/Box
Free delivery by Wed, Apr 23
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Quality Park Gummed Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White Wove, 500/Box (QUA24524)~#|#~sp40322449_sc7Quality Park Gummed Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White Wove, 500/Box (QUA24524)~#|#~sp40322448_sc7
Item: 823255
Model: QUA24524
Price is $96.79
Unit of measure 500/Box
Free delivery by Wed, Apr 23
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LUX #9 Window Envelopes, 3 7/8" x 8 7/8", White w/ Simple Seal, 50 Qty (45313-50)~#|#~m004064011_sc7
Item: 2146254
Model: 45313-50
No reviews yet
Price is $36.39
Unit of measure 50/Pack
Free delivery by Wed, Apr 30
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LUX Moistenable Glue Security Tinted #9 Window Envelope, 3 7/8" x 8 7/8", White, 250/Box (61549-250)~#|#~m000161337_sc7
Item: 385460
Model: 61549-250
Price is $55.19
Unit of measure 250/Box
Free delivery by Wed, Apr 30
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JAM Paper Commercial #9 Envelopes, 3 7/8" x 8 7/8", White, 250/Box (1633172H)~#|#~sp111772371_sc7JAM Paper Commercial #9 Envelopes, 3 7/8" x 8 7/8", White, 250/Box (1633172H)~#|#~sp111772370_sc7
Item: 1590034
Model: 1633172H
Price is $41.79
Unit of measure 250/Box
Free delivery by Fri, Apr 25
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JAM Paper #9 Booklet Envelopes, 3 7/8" x 8 7/8", Pastel Baby Pink, 50/Pack (R2174-50)~#|#~49FD8B08-AEFA-4F87-8BE0D7B4BA491B79_sc7JAM Paper #9 Booklet Envelopes, 3 7/8" x 8 7/8", Pastel Baby Pink, 50/Pack (R2174-50)~#|#~1A748C61-CC3F-483A-8AE90789AE6E21E3_sc7
Item: 24604511
Model: R2174-50
No reviews yet
Price is $15.95
Unit of measure 50/Pack
Delivery by Fri, Apr 25
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JAM Paper #9 Booklet Envelopes, 3 7/8" x 8 7/8", Pastel Blue, 50/Pack (R2176-50)~#|#~63151B8E-1A1F-40D4-A0A751F5CEEE3F35_sc7JAM Paper #9 Booklet Envelopes, 3 7/8" x 8 7/8", Pastel Blue, 50/Pack (R2176-50)~#|#~63266FC2-73E2-468A-8487659D4B8ECE8C_sc7
Item: 24604624
Model: R2176-50
No reviews yet
Price is $15.95
Unit of measure 50/Pack
Delivery by Fri, Apr 25
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Over 30
LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 250/Box, 80lb. Bright White (72973-80W-250)~#|#~m001149707_sc7
Item: 1029956
Model: 72973-80W-250
No reviews yet
Price is $126.59
Free delivery by Wed, Apr 30
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JAM Paper #9 Regular Envelopes, 3 7/8 x 8 7/8, Natural, 50/Pack (4855-NPC-50)~#|#~333485AE-5825-4929-AAED2A8A8DC7CE1C_sc7
Item: 24604468
Model: 4855-NPC-50
No reviews yet
Price is $15.95
Unit of measure 50/Pack
Delivery by Fri, Apr 25
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Over 30
LUX 3 7/8" x 8 7/8" #9 60lbs. Regular Envelopes, goldenrod yellow, 50/Pack~#|#~m000081394_sc7
Item: 282006
Model: 73072-50
No reviews yet
Price is $20.89
Unit of measure 50/Pack
Delivery by Wed, Apr 30
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Over 30
LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 250/Box, Midnight Black (LUX-72973-B-250)~#|#~m001149686_sc7
Item: 1029934
Model: LUX-72973-B-250
No reviews yet
Price is $136.39
Free delivery by Wed, Apr 30
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Red, 100/Pack (1532900D)~#|#~1939509C-71F0-4478-8909659050AE3946_sc7
Item: 24557992
Model: 1532900D
Price is $36.39
Unit of measure 100/Pack
Free delivery by Fri, Apr 25
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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 $30.39
Delivery by Wed, Apr 30
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LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 50/Box, 80lb. Bright White (72973-80W-50)~#|#~m001149707_sc7
Item: 1030039
Model: 72973-80W-50
No reviews yet
Price is $30.09
Delivery by Wed, Apr 30
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Ultra Lime Green, 50/Pack (1532898I)~#|#~sp6271491_sc7JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Ultra Lime Green, 50/Pack (1532898I)~#|#~sp6271490_sc7
Item: 24006116
Model: 1532898I
No reviews yet
Price is $23.89
Unit of measure 50/Pack
Delivery by Fri, Apr 25
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LUX #9 Regular Envelopes (3 7/8 x 8 7/8) 50/Pack, Grocery Bag (4855-GB-50)~#|#~sp12274947_sc7LUX #9 Regular Envelopes (3 7/8 x 8 7/8) 50/Pack, Grocery Bag (4855-GB-50)~#|#~sp14081664_sc7
Item: 24216326
Model: 4855-GB-50
No reviews yet
Price is $27.19
Unit of measure 50/Pack
Delivery by Wed, Apr 30
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LUX 80lbs. 3 7/8" x 8 7/8" #9 100% Recycled Regular Envelopes, Natural, 250/BX~#|#~m000161381_sc7
Item: 384565
Model: 4855-NPC-250
No reviews yet
Price is $53.15
Unit of measure 250/Box
Free delivery by Wed, Apr 30
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Over 30
LUX #9 Regular Envelopes, 3 7/8" x 8 7/8", Bright Orange, 50 Qty (WS-2032-50)~#|#~m004063982_sc7
Item: 2146614
Model: WS-2032-50
Price is $30.19
Unit of measure 50/Pack
Delivery by Wed, Apr 30
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LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 1000/Box, 80lb. Bright White (72973-80W-1000)~#|#~m001149707_sc7
Item: 1029957
Model: 72973-80W-1000
No reviews yet
Price is $136.27
Free delivery by Wed, Apr 30
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LUX #9 Business Envelope, 3 7/8" x 8 7/8", Bright Green, 250/Pack (WS-2037-250)~#|#~m004063981_sc7
Item: 2146603
Model: WS-2037-250
No reviews yet
Price is $83.49
Unit of measure 250/Pack
Free delivery by Wed, Apr 30
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Yellow, 100/Pack (1532902D)~#|#~5F10F325-747E-4A26-B98E209A1FA033CA_sc7
Item: 24557986
Model: 1532902D
No reviews yet
Price is $36.39
Unit of measure 100/Pack
Free delivery by Fri, Apr 25
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Over 30
LUX #9 Regular Envelopes, 3 7/8" x 8 7/8", Bright Green, 500 Qty (WS-2037-500)~#|#~m004063981_sc7
Item: 2146594
Model: WS-2037-500
No reviews yet
Price is $128.09
Unit of measure 500/Pack
Free delivery by Wed, Apr 30
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Lime Green, 100/Pack (1532898D)~#|#~2447E503-2210-4B95-9ED895EA98E03389_sc7
Item: 24557929
Model: 1532898D
No reviews yet
Price is $32.99
Unit of measure 100/Pack
Delivery by Fri, Apr 25
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Over 30
LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 250/Box, 70lb. Natural (72973-01-250)~#|#~m001149708_sc7
Item: 1028603
Model: 72973-01-250
No reviews yet
Price is $51.69
Free delivery by Wed, Apr 30
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Over 30
LUX Gummed Security Tinted #9 Business Envelopes, 3 7/8" x 8 7/8", White, 1000/Box (61549-1000)~#|#~sp39612763_sc7
Item: 385459
Model: 61549-1000
Price is $107.89
Unit of measure 1000/Box
Free delivery by Wed, Apr 30
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Sea Blue, 100/Pack (1532901D)~#|#~5AEC9842-E0EA-4B0A-A29FE544827B9B30_sc7
Item: 24557933
Model: 1532901D
No reviews yet
Price is $35.59
Unit of measure 100/Pack
Free delivery by Fri, Apr 25
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Over 30
LUX Slimline Invitation Envelopes (3 7/8 x 8 7/8) 50/Pack, 24lb. Bright White (72973-50)~#|#~sp14807860_sc7
Item: 24260338
Model: 72973-50
Price is $22.09
Unit of measure 50/Pack
Delivery by Wed, Apr 30
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Over 30
JAM Paper #9 Business Colored Envelopes, 3.875 x 8.875, Ultra Lime Green, Bulk 500/Box (1532898c)~#|#~sp6271491_sc7JAM Paper #9 Business Colored Envelopes, 3.875 x 8.875, Ultra Lime Green, Bulk 500/Box (1532898c)~#|#~sp6271490_sc7
Item: 24006115
Model: 1532898C
No reviews yet
Price is $176.29
Unit of measure 500/Box
Free delivery by Fri, Apr 25
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Over 30
JAM Paper Booklet Envelope 3 7/8" x 8 7/8", Green, 100/Pack (1532896d)~#|#~4657672F-0411-4C85-B91A772E72E5A2D0_sc7JAM Paper Booklet Envelope 3 7/8" x 8 7/8", Green, 100/Pack (1532896d)~#|#~ADE364E7-6CF2-4F0F-A71B03EBC3D4D5EB_sc7
Item: 24604660
Model: 1532896d
No reviews yet
Price is $32.99
Unit of measure 100/Pack
Delivery by Fri, Apr 25
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Over 30
JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", White, 500/Box (1633172C)~#|#~sp111772371_sc7JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", White, 500/Box (1633172C)~#|#~sp111772370_sc7
Item: 2103316
Model: 1633172C
Price is $47.39
Unit of measure 500/Box
Free delivery by Fri, Apr 25
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Over 30
LUX 24lbs. 3 7/8" x 8 7/8" #9 Regular Envelopes, White Linen, 500/BX~#|#~6283448D-6E57-4E65-977CE06C0DD35DD5_sc7
Item: 384572
Model: 4855-WLI-500
Price is $172.89
Unit of measure 500/Box
Free delivery by Wed, Apr 30
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Over 30
LUX Self Seal #9 Business Envelope, 3 7/8" x 8 7/8", Natural Linen, 50/Pack (4855-NLI-50)~#|#~sp14807403_sc7
Item: 24260862
Model: 4855-NLI-50
Price is $17.99
Unit of measure 50/Pack
Delivery by Wed, Apr 30
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Envelopes for office and personal use come in many different shapes and sizes. For many businesses, envelopes play an integral role in daily operations. They are used for return mail and to relay sensitive information securely. Size 9 or #9 envelopes are heavily relied upon by businesses because they fit easily inside of the larger #10 envelopes (4 1/8" x 9 ½”). These envelopes are the perfect choice for receiving return mail, like payments, donations and other reply mail. Read on to learn more about why you should consider including size 9 envelopes on your next order of office supplies.

What Are Size 9 Envelopes Used For?

Size 9 envelopes fit perfectly in their larger counterparts, #10 envelopes, making them perfect for return or reply mail. Businesses that send messages that require a reply or return mail on behalf of the recipient will typically use the #9 envelope size. Credit card companies, insurance firms and non-profits often include these envelopes in their messages to make it easier for the recipient to mail a payment or donation. Magazines may send out size 9 envelopes with their latest issue if it's time to subscribe again.

What Features Do Size 9 Envelopes Have?

Depending on what a business’ needs are, there are many different size 9 envelopes to choose from. Staples offers a range of color and design options for businesses who are looking to put a personal touch on their correspondence with clients. Some #9 envelopes even come with security features such as tinted plastic films to ensure that a customer’s sensitive information is secure in transit. Read more about these common size 9 envelope features below.

Tinted Security Windows

Many size 9 envelopes designed for sending documents that contain sensitive information feature tinted security windows. A business might provide customers with tinted envelopes because they offer a means of theft deterrent. #9 envelopes with a security tint are a good option for debt collectors and non-profits alike because people are less likely to tamper with an envelope if they do not suspect there’s money involved. For many companies, this is a best practice to incorporate, because it ensures that there are no hiccups while requesting payments or sensitive information through the mail.

Strong Adhesive Seals

Staples offers a variety of size 9 envelopes and seal options. The most commonly used style is a traditional gum seal. Gum seal envelopes have a water-soluble gum strip that you moisten to seal. Many modern size 9 envelopes have adhesive strip seals for those who require an added layer of security. Self-seal and moistenable glue #9 envelopes come with a strong adhesive that’s ready to peel and go. These built-in seals are similar to shipping and packing tape and erase any fears one might have about their mail opening in transit.

Many Colorful Options to Choose From

The #9 envelope size comes in many colors for professionals and businesses that want to add a more personal or creative touch to their correspondence with customers. At Staples, you can choose from orange, pink, beige and everything in between. These fun size 9 envelope shades help add a personal touch to any business’ marketing campaigns - a perfect choice to consider when the time comes for customers to resubscribe!