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#9 Envelopes - 3 7/8" x 8 7/8"

Staples Self Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (ST28731-CC)~#|#~C945D44A-B550-4411-A459E3DC59387BBE_sc7Staples 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
42% off of Staples 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 $19.99, Regular price was $34.99, You save 42%
Unit of measure 500/Box Price per unit $0.04/Envelope
Next-Day Delivery by tomorrow
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Staples Reveal-N-Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (1017262)~#|#~683A2A46-F396-4F3D-8BEF7AA963ACA369_sc7Staples Reveal-N-Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (1017262)~#|#~235E6FB2-640F-41BC-BB61559456FA9BC6_sc7
Staples Reveal-N-Seal Security Tinted #9 Double Window Envelopes, 3 7/8" x 8 7/8", White, 500/Box (1017262) is New at Staples
Item: 24640907
Model: ST63385-CC
Price is $51.29
Unit of measure 500/Box Price per unit $0.10/Box
Free Next-Day eligible by tomorrow
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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
Item: 266759
Model: ST266759-CC
Price is $31.89
Unit of measure 500/Box Price per unit $0.06/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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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 $33.19
Unit of measure 500/Box Price per unit $0.07/Envelope
Next-Day Delivery by tomorrow
30-min pickup
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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 $37.29
Unit of measure 50/Pack
Free delivery by Fri, Oct 10
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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 $110.59
Unit of measure 1000/Box
Free delivery by Fri, Oct 10
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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 $34.99
Unit of measure 500/Box Price per unit $0.07/Envelope
Next-Day Delivery by tomorrow
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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)~#|#~FFB20ACC-811B-46CB-80A6CB9D7BAA9B82_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 $107.79
Unit of measure 500/Box Price per unit $0.22/Envelope
Free Next-Day eligible by tomorrow
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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 $99.29
Unit of measure 500/Box
Free Next-Day eligible by tomorrow
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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 $56.59
Unit of measure 250/Box
Free delivery by Fri, Oct 10
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Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 50/Pack (24529-50)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 50/Pack (24529-50)~#|#~s1196808_sc7
Item: 23996120
Model: 24529-50
Price is $39.09
Unit of measure 50/Pack
Free delivery by Fri, Oct 10
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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 $36.99
Unit of measure 500/Box
Free Next-Day eligible by tomorrow
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Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 250/Pack (24529-250)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 250/Pack (24529-250)~#|#~s1196808_sc7
Item: 23996116
Model: 24529-250
Price is $91.39
Unit of measure 250/Pack
Free delivery by Fri, Oct 10
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Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 1000/Pack (24529-1000)~#|#~sp5822112_sc7Quality Park Redi-Seal Self Seal Security Tinted #9 Double Window Envelope, 3 7/8" x 8 7/8", White Wove, 1000/Pack (24529-1000)~#|#~s1196808_sc7
Item: 23996113
Model: 24529-1000
Price is $225.49
Unit of measure 1000/Pack
Free delivery by Fri, Oct 10
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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 Tue, Oct 07
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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 $18.49
Unit of measure 50/Pack
Delivery by Fri, Oct 10
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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 $54.49
Unit of measure 250/Box
Free delivery by Fri, Oct 10
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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 $15.59
Unit of measure 50/Pack
Delivery by Fri, Oct 10
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LUX 60lbs. 3 7/8" x 8 7/8" #9 Regular Envelopes, goldenrod yellow, 500/BX~#|#~m000081394_sc7
Item: 385661
Model: 73072-500
Price is $101.59
Unit of measure 500/Box
Free delivery by Fri, Oct 10
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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 $21.49
Unit of measure 50/Pack
Delivery by Fri, Oct 10
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LUX 3 7/8" x 8 7/8" #9 60lbs. Remittance, Donation Envelopes, Pastel Blue, 50/Pack, 10 Packs/Box~#|#~m000081406_sc7
Item: 282018
Model: R2176-500
No reviews yet
Price is $101.29
Unit of measure 500/Box
Free delivery by Fri, Oct 10
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", White, 1000/Carton (01633172B)~#|#~m002934526_sc7JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", White, 1000/Carton (01633172B)~#|#~m002934525_sc7
Item: 367896
Model: 01633172B
Price is $82.69
Unit of measure 1000/Carton
Free delivery by Tue, Oct 07
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JAM Paper #9 Booklet Envelope 3 7/8" x 8 7/8", Pastel Green, 50/Pack (R2175-50)~#|#~32FC45AA-485F-4B2B-8B3AFA388596586B_sc7
Item: 24604623
Model: R2175-50
No reviews yet
Price is $15.95
Unit of measure 50/Pack
Delivery by Tue, Oct 07
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JAM Paper #9 Booklet Envelopes, 3 7/8" x 8 7/8", White, 50/Pack (4855-WPC-50)~#|#~8F1C6A7A-DE6C-420D-A2B7EE9D92B14F1E_sc7
Item: 24604464
Model: 4855-WPC-50
No reviews yet
Price is $15.95
Unit of measure 50/Pack
Delivery by Tue, Oct 07
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JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Yellow, 25/Pack (1532902)~#|#~m006267609_sc7JAM Paper #9 Business Envelope, 3 7/8" x 8 7/8", Yellow, 25/Pack (1532902)~#|#~m006267534_sc7
Item: 24052314
Model: 1532902
No reviews yet
Price is $14.29
Unit of measure 25/Pack
Delivery by Tue, Oct 07
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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 Tue, Oct 07
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LUX 70lbs. 3 7/8" x 8 7/8" #9 Regular Envelopes, Natural Linen, 250/BX~#|#~m000161382_sc7
Item: 384546
Model: 4855-NLI-250
Price is $54.59
Unit of measure 250/Box
Free delivery by Fri, Oct 10
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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 $131.29
Unit of measure 500/Pack
Free delivery by Fri, Oct 10
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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 $15.19
Unit of measure 50/Pack
Delivery by Fri, Oct 10
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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 $37.29
Unit of measure 100/Pack
Free delivery by Tue, Oct 07
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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 $24.49
Unit of measure 50/Pack
Delivery by Tue, Oct 07
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LUX 24lbs. 3 7/8" x 8 7/8" #9 Regular Envelopes, White Linen, 500/BX~#|#~6283448D-6E57-4E65-977CE06C0DD35DD5_sc7
LUX 24lbs. 3 7/8" x 8 7/8" #9 Regular Envelopes, White Linen, 500/BX is Out of stock
Item: 384572
Model: 4855-WLI-500
Price is $98.79
Unit of measure 500/Box

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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!