Customer Reviews for Staples Self Seal Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST511289-CC)
Item # : 511289
Model # : ST511289-CC
Easily handle large business mailings with this box of 500 Staples 4.125 x 9.5-inch white self-sealing security-tint envelopes.
- US #10 business envelopes are suitable for all your mailing needs
- Made from white 24 lb. paper for durability
Price is $30.99
Unit of measure 500/Box Price per unit $0.06/Envelope
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Over 30
157 reviews
Most helpful positive review
Posted Sep 30, 2025
Perfect fit!
Instead of buying expensive envelopes from our bank for mailing our checks I found these alternative envelopes that are much more affordable and work perfectly!
VS
Most helpful critical review
Posted Jul 21, 2025
DO NOT PURCHASE! This is by far the worst Staples purchase I have ever made. I purchased 8 boxes of these and every envelope was already sealed to itself or the edges weren't sealed. We were doing a mass mailing and didn't have time to return and purchase something else. So disappointed that staples would even sell these.
PAULA B.
Verified Buyer
Reviewed at:
Staples Business
Posted Sep 30, 2025
Perfect fit!
Instead of buying expensive envelopes from our bank for mailing our checks I found these alternative envelopes that are much more affordable and work perfectly!
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MARY A.
Verified Buyer
Posted Aug 29, 2025
Needed for small business
Original item was active on website but was sold out by checkout time. Had to cancel original order. This item was a suitable substitution for a few dollars more.
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BECKY A.
Verified Buyer
Posted Aug 25, 2025
Not Secure
These envelopes do not seal securely at all. They are easily peeled open enabling tampering.
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Tammy B.
Reviewed at:
Staples Business
Posted Jul 21, 2025
DO NOT PURCHASE! This is by far the worst Staples purchase I have ever made. I purchased 8 boxes of these and every envelope was already sealed to itself or the edges weren't sealed. We were doing a mass mailing and didn't have time to return and purchase something else. So disappointed that staples would even sell these.
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WILLIAM P.
Verified Buyer
Posted Jul 4, 2025
Self-seal envelopes
These envelopes are just what I needed for my mail letters and bills.
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SHYLONDA W.
Verified Buyer
Reviewed at:
Staples Business
Posted Jun 23, 2025
The item is frequently used and of great quality.
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3411 P.
Verified Buyer
Reviewed at:
Staples Business
Posted May 22, 2025
Not tamper proof
The seal can be opened and resealed without much notice that it was opened. To be secure it should also break-away when opened to show tampering.
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ANGELA L.
Verified Buyer
Reviewed at:
Staples Business
Posted Feb 27, 2025
Excellent
The package arrived in great condition and the envelopes are a solid 5 in my opinion. Thank you!
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CATHY M.
Verified Buyer
Posted Oct 2, 2024
self seal envelopes
thank you for having this type of envelope in stock. i needed some envelopes. and this is it.
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E.M.
Verified Buyer
Posted Jul 16, 2024
Perfect envelooe
Perfect size Perfect closing Perfectly convenient
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JAMES E F.
Verified Buyer
Posted May 16, 2024
Excellent Product
Easy to use. Good security.
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MURRAY K.
Posted Apr 1, 2024
Distorted
Envelopes were distorted and would not print on my printer.
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DIANNA T.
Verified Buyer
Reviewed at:
Staples Business
Posted Feb 27, 2024
FINE
THEY ARE ENVELOPES
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Penny B.
Verified Buyer
Reviewed at:
Staples Business
Posted Dec 10, 2023
Self-Sealing Security-Tint #10 Envelopes
There is no skicky stuff on the envelopes. When you feel off the tab you have plain paper.
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SUSAN S.
Verified Buyer
Posted Nov 20, 2023
Great for mailings
I volunteer at several local non-profits. For mailings from 20 - 200 these envelopes speed up the process of stuffing and sealing. Once sealed it stays sealed. I can buy cheaper envelopes but efficiency and speed is lost. These are worth the extra cost.
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LAURIE F.
Verified Buyer
Posted Nov 13, 2023
Envelopes
Work great 👍
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Kara
Verified Buyer
Posted Oct 26, 2023
Not completely self sealing
In my box all 500 envelopes are only self sealing about 60% of the way. The gummy stuff is missing on left side of envelope. Have to apply envelope adhesive to the left side.
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James
Verified Buyer
Posted Oct 25, 2023
Don't seal
We got these to save time for a large mailing. Mistake. One because of how the envelope is folded it is difficult to quickly open and stuff. Two about every fifth envelope simply didn't seal like the sticky parts were too old. Find another solution for your large mailings - this was not a time saver at all.
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Work
Verified Buyer
Posted Sep 25, 2023
self seal - stuck together
Self Seal - stuck together - where it says lift here- can't - all envelopes are stuck together - wont buy again.
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LORRAINE P.
Verified Buyer
Posted Sep 17, 2023
Staples self seal security tinted #10 business Envelopes
They are different than any envelopes I have purchased the self seal part is totally different but it works good.
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