Customer Reviews for Staples InstantSeal Security Tinted #8 Double Window Envelopes, 3 5/8" x 8 5/8", White, 500/Box (ST63337)
Item # : 1775860
Model # : ST63337
Make mailing projects manageable with this 500-pack of white Staples InstantSeal security-tinted double-window #8-5/8 envelopes.
- New and improved envelope
- Tamper proof, perforated seal to keep documents safe
Price is $39.99
Unit of measure 500/Box Price per unit $0.08/Envelope
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Over 30
15 reviews
Most helpful positive review
Posted Nov 4, 2025
Great quality and perfect size
I was pleasantly surprised by how sturdy these envelopes are. The paper feels durable and private, not flimsy. They seal well without needing extra tape. The #8 size is just right for mailing checks, small letters, or folded documents, and they fit perfectly in my desk organizer. The quantity is generous (I was surprised), so I won’t run out anytime soon. Overall, great...
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Sunshine
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 7, 2025
Envelopes
My overall impression of these envelopes was good. The envelope itself was pretty generic nothing overly special. The quality and size was good for sending letters, however the windows for the address limited the versatility of the envelopes. The overall quality of the paper was nice. The best part of the envelopes were the quality.
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Kate
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 5, 2025
Gets the job done well
These envelopes were perfect for our mailings.
-stayed closed after sealing
-felt substantial
-paper was thick and not see-through
-the address windows were large enough for the addresses, but not so large that you could see parts of the mailings.
-stayed closed after sealing
-felt substantial
-paper was thick and not see-through
-the address windows were large enough for the addresses, but not so large that you could see parts of the mailings.
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AshleyG
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 4, 2025
Perfect Everyday Business Envelope
The Staples #8 envelopes are exactly what I need. The size is perfect for checks, personal letters, or small documents. What really stands out to me is the fold design of the sealer and the non-wet sealing strip—no more licking or using a sponge to seal them! It’s clean, fast, and holds securely.
The paper quality feels durable, and the classic white finish gives them ...
The paper quality feels durable, and the classic white finish gives them ...
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Jblack06
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 4, 2025
Great self sealing envelopes
These envelopes are easy to use and I love that they are self sealing, no more licking! That is so nice when you are sending many letters at once. I like that the removable strip is paper, not plastic because limiting plastics is important to me. The only thing I would change is having the adhesive strip be a little longer so the entire flap is sealed, there is a little...
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Silena
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 4, 2025
Great quality and perfect size
I was pleasantly surprised by how sturdy these envelopes are. The paper feels durable and private, not flimsy. They seal well without needing extra tape. The #8 size is just right for mailing checks, small letters, or folded documents, and they fit perfectly in my desk organizer. The quantity is generous (I was surprised), so I won’t run out anytime soon. Overall, great...
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GreatEnvelope
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 4, 2025
Solid business envelope
The Staples #8 White Envelopes are perfect for my everyday business mailing needs. The size (3.625" x 8.625") is just right for checks, letters, and small documents and the inside print helps keep documents confidential. The paper feels sturdy, and the seal sticks quickly and well without needing extra tape. They look clean and professional and are great to have on hand...
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Sunni
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Nov 1, 2025
Convenient Easy to Use Envelopes
These Staples envelopes are great! They feel like good quality every day envelopes. I got the box of 500, which is a hefty amount and will last a long time. The clear double windows are long enough to fit lengthy addresses, and are spaced wel. They have a blue privacy tint which makes them perfect for mailing bills or other sensitive correspondence. My favorite thing...
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KourtyAnn
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 31, 2025
Fantastic for School Use
These envelopes are exactly what I needed to send home information from school as a teacher. They are professional-looking, easy to use, and perfectly sized for a folded sheet of paper. I am pretty good at folding papers like I need to, so that wasn't a problem for me, but I could see if being pretty difficult for someone who doesn't mail things daily. Overall, they wer...
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rjpoli
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 31, 2025
Gets the job done
This envelope gets the job done for whatever purpose it may serve you. Size is just right for everything you want to put into it. The envelope is sturdy, the seals are tighly sealed with no gaps or openings. I mailed 4 mail size paper folded and the envelope held up well when shipped. I wish that the paper used is a bit harder but in no way it affected the envelope, jus...
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CarDar
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 31, 2025
Functional Envelopes
The Staples #8 Envelopes (3.625" x 8.625", White) are fantastic! They’re incredibly functional, and I love that they have a self-seal feature, no licking required. Unlike some envelopes that make it difficult to align the return and delivery addresses, these are designed perfectly so both are clearly visible. I highly recommend them for work mail, bill payments, or anyt...
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Vanessa
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 31, 2025
A Perfect Shipping Option for my Small Business
In my small business, I have to send monthly invoices to clients. I usually pick up small packages of windowed envelopes but was excited to be given the chance to try this bulk option by Staples.
My first impression is that the quality and security are great. The envelopes feature a security lining that keeps my client's information secured. The paper is not flimsy...
My first impression is that the quality and security are great. The envelopes feature a security lining that keeps my client's information secured. The paper is not flimsy...
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BiznessGuy
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 31, 2025
Clean and Professional
These envelopes were just what I needed. They look clean and professional, and the quality is solid — not flimsy at all. The size was exactly as described, and the pack came with plenty to get me through a bunch of mailings. My favorite part is how nice and neat they look when sealed — very polished. I’ll definitely be using these again for all my mailing needs.
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MattKG98
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 20, 2025
Perfect Envelopes
The Staples Envelopes #8 3.625 X 8.625 in White are perfect for all my business needs. They have a very clear viewing window for the mailing address and return address. They seal nicely and do not reopen due to the Instant Seal lift-tab (thankfully...no need to lick to stick). They are lined with security printing for privacy. They check all my boxes for a good busin...
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Mediocre
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 18, 2025
Middle of the road envelopes
If there is anything I could ever put a three star rating on, these would be first. My overall impression of these envelopes is that they are useful for payroll or something similar, but they seem cheaply manufactured and even translucent to the point of being unable to use for private information. The size looks great, normal letter size and the window boxes are large ...
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A.S.
This reviewer received a free product or coupon in exchange for an unbiased review of the product
Posted Oct 15, 2025
Great quality envelopes
I work from home and with 3 kids in school we use envelopes all the time. Overall I liked these a lot. The quality is nice although being a little thicker would’ve been nice for some papers inside. The size is perfect for a standard size. It has room and I like that there’s the return window already on there. The group I got came with so many envelopes. We should be ...
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