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
2
Sticky strip difficult
on October 31, 2025
Posted by: Sticky
[This review was collected as part of a promotion.] The envelopes are slightly larger than I was hoping. They are wider than a piece of paper so a standard paper slides inside. The same for the quickbooks checks we use. The sticky part is not great. We use other brands and this one has a perforated strip to rip off that doesn’t rip perfectly so some pieces of paper are left behind and get in the way of the sticky strip. Overall I would not choose this style.
No, I would not recommend this to a friend.
Written by a customer while visiting Staples
Customer Rating
4
Fine envelopes
on October 31, 2025
Posted by: dar3x
[This review was collected as part of a promotion.] My overall impression is that these are good quality business envelopes. They're obviously standard size, have gently tinted double windows for privacy and are well constructed. The paper isn't flimsy and neither were the plastic windows (I haven't used an entire box yet, but of the ones I've been through not a single window has come loose or unglued!). I exclusively use envelopes with adhesive, especially for large business mailings, but I've never used one with a perforated adhesive strip cover before. None of these strips ripped cleanly for me (see photo) unless I was slow and deliberate with each envelope. Still, the adhesive itself is never compromised and holds the flap very firmly. These rough edges at the perforation are not visible after the envelopes after the envelopes are closed, so it's only a minor issue. I'm still partial to the adhesives with the plastic cover but these envelopes leave no plastic waste which is a big plus! Overall I definitely recommend.
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
5
Secure easy close feature
on November 4, 2025
Posted by: SuperSweet03
[This review was collected as part of a promotion.] These Staples #10 envelopes make mailing so much easier. The instant-seal feature is a total game changer, no licking, no soggy seals, and no glue sticking to your fingers. Just press and you’re done! They seal tightly every time and look clean and professional. The size is perfect for everyday mail and business use, and the paper feels sturdy and high-quality. If you’re tired of the old-school lick-and-stick envelopes, these are absolutely worth it.
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
4
Does the job
on October 16, 2025
Posted by: K.B.
[This review was collected as part of a promotion.] These envelopes are exactly what I was looking for - appropriate windows to mail the checks from my organization. Seal works well no complaints. Very adequate for the job.
Written by a customer while visiting Staples
Customer Rating
5
Window envelopes
on November 2, 2025
Posted by: mweisert
[This review was collected as part of a promotion.] These envelops are durable and good for business mailings. They are not flimsy or see through - they have the nice blue detailing inside to prevent others for checking the contents. The size is good for all standard letters and documents. The instant seal option is new to me and is a lot nicer than having to lick or moisten the adhesive. I have used the peel and stick envelopes before, but this method adds another feature. If you try to re open the letter there are perforated marks on the envelope that rip so you know it has been messed with. At first I felt like the adhesive was not very strong, but after a minute it was a lot harder to open and as mentioned above the tabs rip so you know it was attempted to be opened. I would order these envelopes again due to this feature. The window is nice, but you do need formulate your letters with their destination on them so it fits in the window.
I would recommend this to a friend!
Written by a customer while visiting Staples
Customer Rating
5
Excellent self adhesive envelopes
on October 15, 2025
Posted by: S.T.
[This review was collected as part of a promotion.] I thought the quality of the envelopes was excellent! The size is perfect for standard letter filings and it can fit several pages at a time. They were super easy to seal and the adhesive was excellent and secure. The adhesive was my favorite part of the envelope. I would highly recommend.
Written by a customer while visiting Staples
Posted by: BarbieLee
Verified Purchase:Yes
Worst product ever! I ordered one box and you can't even unfold the slap because it is so stuck. Returned for a replacement box and it is just as bad! Have had to resort to using tape to seal them.
No, I would not recommend this to a friend.
Written by a customer while visiting Staples