Customer reviews from Staples
Staples - Self Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", 500/Box (ST28730-CC) - White
Average customer rating
4.1
(15 Reviews)
Rating breakdown 15 reviews
5 Stars
7
4 Stars
6
3 Stars
0
2 Stars
1
1 Star
1
78%of customers recommend this product.
(
7 out of
9)
Customer Reviews for Staples - Self Seal Security Tinted #10 Double Window Envelopes, 4 1/8" x 9 1/2", 500/Box (ST28730-CC) - White
Customer Rating
5
Great Envelopes for the Office
on October 20, 2025
Posted by: KVetter
[This review was collected as part of a promotion.] We tested these out in our public school district office, and we were very happy with them. We handle extremely delicate information, so anything we send out needs to be very secure. I felt like these envelopes are just that! They weren’t in the least transparent, so we didn’t worry at all about that. The seal was very different from a regular self-sealing envelope, and I love that there isn’t that strip of trash you have to throw away for every envelope. Once sealed, I tried, and was unable to, open the envelope without leaving evidence of tampering. I love that! Overall, I will absolutely look for these envelopes when it’s time to reorder, and I wholeheartedly recommend them for anyone needing secure envelopes with less paper waste!
Written by a customer while visiting Staples
Customer Rating
5
Good quality
on October 31, 2025
Posted by: Jessicanjzee
[This review was collected as part of a promotion.] These envelopes are made well and are good quality. I like the windows for return address and mailing address. The size of the envelopes are good for standard paper. They are very easy to seal and I like that the Instantseal makes it so I do not have to lick the envelope. The seal remains secure keeping my mail safe.
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
4
Instant seal legal envelopes
on October 14, 2025
Posted by: J.B.
[This review was collected as part of a promotion.] These envelopes are of good quality; they are of a good weight (not too flimsy or thin) and are true privacy envelopes—I could not see my documents through the envelope. I like that I do not have to lick them but I do prefer the top sealing strips rather than bottom—these tear of the edge of the envelope; HOWEVER- they seal must better than than top seal ones. Overall a great envelope!
Written by a customer while visiting Staples
Customer Rating
5
Window Envelopes
on October 19, 2025
Posted by: Amckinney1219
[This review was collected as part of a promotion.] The envelopes were great. Perfect t size to mail letters. Has a nice viewing window for the sender’s address. The envelop is made from good quality paper, which means it won’t fall apart during shipping. It was easy to seal and the seal was nice and tight. I feel confident using these envelopes.
Written by a customer while visiting Staples
Customer Rating
4
Professional easy and convenient
on October 31, 2025
Posted by: Jays91
[This review was collected as part of a promotion.] Our office has been using these envelopes for general mailings and they have been so convenient and easy to use. Drafting letters and formatting to fit the windows was very easy and we had no issues making them look professional. The seal sealer was a little tricky since it is perforated. I would rather it be a strip to reveal the adhesive. The perforated strip can take a few more moments and not always comes off perfect. The envelopes did seem a little wider than your standard size envelope but it didn’t bother our mailings too much. The security lining was a nice addition especially for our business which can hold sensitive information from time to time in our letters. Overall a great option for any small business.
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
4
Great convenience
on November 1, 2025
Posted by: TeMaEv
[This review was collected as part of a promotion.] I received a sample of this product for my honest review feedback.
Our family found these envelopes to meet all of our needs. They were a good quality and the window plastic was secured well so it didn’t come off. We thought that the adhesive was adequate, easy to seal. The envelopes themselves seemed to he secure, with nothing showing through the paper. Overall, we were very pleased!
Our family found these envelopes to meet all of our needs. They were a good quality and the window plastic was secured well so it didn’t come off. We thought that the adhesive was adequate, easy to seal. The envelopes themselves seemed to he secure, with nothing showing through the paper. Overall, we were very pleased!
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
4
Great non lick envelopes
on November 1, 2025
Posted by: SJML52
[This review was collected as part of a promotion.] My overall impression of these envelopes was they are sturdy, quality paper--not flimsy like some, a clear window and self adhesive!! No licking required! They hold shape well and don't seem like the kind of envelope that would be smashed by careless mail carriers! The quality seems above average and they are perfect letter size papers. I trifold any normal size paper but they also fit a normal size check. The sealing is my favorite part! No wet sponge or licking required! One or two of the envelopes were a little dry on the edges but still sealed and I think to be expected. Thankfully the pack had a ton of envelopes so even if I had to tape one or two for extra security it wasn't a big deal! I really enjoyed the quality and clarity of the window on the envelope. I also enjoyed that they fit a tri folded paper well and I didn't need to shove or smash the paper in there. Overall would definitely recommend!
What did you like most about these envelopes?
What did you like most about these envelopes?
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
5
So easy to us
on October 19, 2025
Posted by: MomNurse
[This review was collected as part of a promotion.] The Staples #10 White Envelopes are a simple product done right. The paper quality feels sturdy, not too thin or flimsy, making them ideal for mailing letters, invoices, or professional correspondence. The adhesive seal is strong and secure yet easy to close without making a mess or requiring moisture. They have a clean, bright white finish that looks crisp and professional, and they fit standard 8.5” x 11” paper tri-folded perfectly. The envelopes come neatly packed and don’t arrive bent or creased, which is always a plus. Overall, these are dependable, high-quality envelopes at a great value. Whether you’re using them for home, school, or office mailings, they deliver exactly what you need with no fuss or issues. Highly recommend!
Written by a customer while visiting Staples