Customer Reviews for Staples QuickStrip EasyClose Self Seal Security Tinted #10 Business Envelopes, 4 1/8" x 9 1/2", White, 500/Box (ST50312-CC)
Item # : 787385
Model # : ST50312-CC
Keep mailings confidential with these Staples EasyClose security-tint #10 white envelopes, which feature a unique interior pattern to help prevent information theft.
- US #10 business envelopes are suitable for many mailing projects
- Made from white 24 lb. paper for durability
Price is $26.99
Unit of measure 500/Box Price per unit $0.05/Envelope
30-min pickup
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Over 30
1963 reviews
Most helpful positive review
Posted Feb 11, 2022
Envelope
The envelopes serve their purpose well. I like not having to lick the envelope to seal it
VS
Most helpful critical review
Posted Jan 5, 2018
Worst ones I have ever used.
They do not stay closed. They will open within 5 minutes of sealing them. This is not acceptable for a company sending confidential information. I cannot recommend these. As the other reviewer stated, buy lots of tape too.
Staples Customer
Verified Buyer
Posted Aug 19, 2025
Self seal #10 envelops
The envelopes work great for mailing items. I thought the quick strip needs to be wider.
0up votes 0
0down votes 0
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LuckySeal
Verified Buyer
Posted Aug 11, 2025
Good envelopes!
We like these; we would order them again and we would recommend them.
0up votes 0
0down votes 0
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Office Manager
Verified Buyer
Posted Aug 6, 2025
Worst seal EVER! Do not waste your money.
These envelopes are a complete waste of money. The seal isn't even near the edge of the flap requiring me to put scotch tape on every one of the envelopes that I use. They are not worth the savings, that's for sure!!!
0up votes 0
0down votes 0
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Staples Customer
Verified Buyer
Posted Jul 29, 2025
Staples No 10 Security Envelopes
Great product especially for the price
0up votes 0
0down votes 0
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KATHRYN S.
Verified Buyer
Posted Jul 2, 2025
fine, meets expectations
0up votes 0
0down votes 0
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CYNTHIA C.
Verified Buyer
Posted Jun 23, 2025
Cheap and thin
Not the best quality. They’re very thin and the self adhesive strip is thin as well. I’ve bought better quality ones before that were namebrand.I wouldn’t buy them again.
0up votes 0
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JOHN J.
Verified Buyer
Posted Jun 16, 2025
Envelopes
Ok envelopes. Glue strip not consistent from 1 envelope to another. Had to use a glue stick to help seal some of them. Really upset to click on review item and they come up $10.00 cheaper than what I paid.
0up votes 0
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MELISSA P.
Verified Buyer
Posted Jun 16, 2025
Excellent
These are excellent. They are exactly what you need to send without any concern. worth it
0up votes 0
0down votes 0
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EDDIE W.
Verified Buyer
Posted Jun 11, 2025
Stapled Quick Seal Envelopes
adhesive not durable
1up votes 1
0down votes 0
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JANE W.
Verified Buyer
Posted Jun 10, 2025
The quick strip does not seal well enough.
1up votes 1
0down votes 0
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Staples Customer
Verified Buyer
Posted May 25, 2025
easy to use when i have a large number of letters
1up votes 1
1down votes 1
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Nicole O.
Verified Buyer
Reviewed at:
Staples Advantage
Posted May 21, 2025
Does not stick
Have to use glue because the self-seal does not stick.
3up votes 3
0down votes 0
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Staples Customer
Verified Buyer
Posted May 21, 2025
very good service, knowledgeable and informative
1up votes 1
1down votes 1
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Staples Customer
Verified Buyer
Posted May 19, 2025
Self SEAL Envelope
Very thin paper construction. Easy seal strip missing on quite a few of the envelopes. So, between paper quality and construction quality I would say mediocre at best.
1up votes 1
0down votes 0
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Staples Customer
Verified Buyer
Reviewed at:
Staples Advantage
Posted May 8, 2025
Don't seal
They seal strip is so small and they don't stay sealed. I wouldn't recommend.
4up votes 4
0down votes 0
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Staples Customer
Verified Buyer
Posted May 5, 2025
5 Stars
Easy to work with it.
0up votes 0
1down votes 1
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LANG W.
Verified Buyer
Posted Apr 30, 2025
Ok but not great
The adhesive is not adequate and they almost do not stay closed. I believe the least little movement will open them in transit.
2up votes 2
1down votes 1
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Response from Staples :
Hi, thanks for replying to our product review request. We appreciate you taking to time to let us know about your experience. ^MS
Staples C., May 1, 2025
Stacie
Verified Buyer
Reviewed at:
Quill
Posted Apr 24, 2025
Poorly Made Batch
My first box of 500 was fine. I reordered and noticed that 2" on the left corner of the envelope where there's no adhesive. Also, there are dark marks on some of them. There's also openings on the bottom right portion of the rear of the envelope. This evidently didn't go through a quality check !
3up votes 3
0down votes 0
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Staples Customer
Verified Buyer
Reviewed at:
Staples Advantage
Posted Apr 13, 2025
STORE MANAGER
ALL WAS WELL
0up votes 0
0down votes 0
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DAVE C.
Verified Buyer
Reviewed at:
Staples Advantage
Posted Mar 24, 2025
Great Cost for the Value
0up votes 0
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