These mailers fit very well for a one or two folders with class materials inside. They slide in easily and then are a quick seal. Only drawback is sometimes the seals don't stick well. I have had to tape them closed a few times.
The sealing process lacks integrity and security. Easily able to open and reseal without an indication of tampering. Additionally the paperweight is light as well as the green ink used.
The item is fine but I thought "self seal" meant it was the "peel-and-stick" type of closure for the envelopes. Instead "self seal" means there is a tiny amount of glue on the envelope and on the tab (in my mind not adequate for mailing -- I add tape on the outside). It's my error in making the purchase but the title could be better.