Columbian #10 Double-Window Self-Seal Security Envelopes, For Business Statements, Invoices, 4-1/8" x 9-1/2", White, 24-lb, 500 Per Box (COLO134)

I am very picky about business envelopes: I want the interior security printing, and I want it to be easy to seal (without licking or using moisture.These envelopes are normal, dual-window #10 envelopes just like one would expect. I've included photos showing the interior, as well as what it looks like sealed. You seal them by lifting the flap and folding the top flap down and pressing.I've used a variety of brands of self-sealing envelopes before, and for all of them, including these, I wouldn't mind a little more "stickum" material. I find the stick with no risk of simply opening up, but you can peel the flaps apart with just a little effort. Again, I think this is with all of these types of seals, not just these. These are as good as any I have purchased.For this kind of envelope, I often add a bit of clear tape over the flap just as a precaution.Note that if you are using software to print a check or invoice to be mailed, be sure to confirm that either this window positioning & size works with your software, or that your software lets you adjust the layout to fit the envelope.

The media could not be loaded. I am usually not a fan of pre-glued envelopes, but found these to be great, and functional.The glue is fresh, not dried out, and the envelopes sealed well.These ARE compatible with QuickBooks online.The price is fair for 500 envelopes.I’m so glad I found these, and they are preferable to licking the envelopes!

These envelopes stated they were for remittance payments, but they are not. They are too large to put a check payment into as they slide all around and the address will not show in the window.

Good price but too thin.

Columbian makes some of the best envelopes and these envelopes are no different! This is the standard #10 size envelope with self sticking adhesive (sticks well, unlike some of the other lower quality ones!). Clear window on the top left and bottom left of the envelope to show sender and receiver addresses. 500 envelopes for $22.67 (at time of review) is a solid deal!

Great for sending mailings out. Very sturdy, easy to use, transparent windows are in the right spot for massive mailing. Great for standard postage.

Box was delivered during a rain/snow storm, but in a plastic envelope, so I'm not sure if this could have negatively affected the self-stick sealing of these envelopes, but they were very dry, didn't appear to be damaged in any way. They did seal, but with just a finger, you could easily re-open the envelope. The box had a '2022' date, so I don't think they were too old... but anyway, the security paper is fine and the quality of the envelopes otherwise appeared to ge good.

Tbh, I don’t know why I got these, but I thought I could use envelopes for something! They are good quality!

Good quality and great price 10 out or 10

These are too big. I purchased these for work. And when you put a cheque in here you can see the amount though the window. Would not recommend.