Columbian #10 Single-Window Security Envelopes, 4-1/8 x 9-1/2 Inch, Self Seal, White, for Mailing Invoices, Statements & Documents, 500/Box (COLO339)

Will definitely purchase again

Well it's what I want totally the same is look in the picture is fit perfect for my checks have no issue at all it's really good I love it

I bought this one for my business. We are small business where we did not sign up for direct deposit for payroll but paying by checks for my employees. These envelope are nice and exactly what I need. I use it to put their paychecks in there as well as to mail out bills. I love to buy in bulk for the business as it is convenient to buy things online and with a good price because it can save me time and effort to go to the store. Envelope are standard size and good quality.

The envelopes are decent quality and I like the peel and seal closure but to label these as Security Envelopes is incorrect. The envelopes are made with good thickness stock and have a security tint printed on the inside, but that security tint is insufficient to keep prying eyes out. If you put the envelope up to a desk lamp, you can read the contents. As they are advertising this as high security, I felt like this should reduce the star rating.

These are your regular envelopes with and easy to seal sticky. Good quality and well made. Plenty of envelopes in the box to make it easy for you and your business.

Good quality envelopes from a known reliable brand. I ship a ton of envelopes for my business and these are as good as any that I use. They are durable enough and seal well. What more is there to say about envelopes?

Envelopes are thick enough and patterned to prevent see through. Window is of nice size and the flap adhesive holds well.

These are good envelopes for day-to-day mailing, but they fall short of being useful for more confidential documents (in my case, payroll checks). I find that you can easily read a one sheet document through the envelopes "security" measures (the printed blue pattern inside) by simply shining a flashlight through it. And while I appreciate the peel and seal aspect, the adhesive does not seal the envelope as well as a moisten seal envelope. You can carefully open the envelope and re-seal and it leaves no signs of tampering. While I will use these envelops for mailing other stuff, I can not use them for my intended purpose of distributing checks.