The glue on the envelopes was not good. We used these envelopes to avoid using clasp envelopes that have to be taped over to go through the post office mailing machines. There were so many envelopes that the glue did not stick at all that we ended up hand taping over 400 envelopes. I realize it is not the fault of the workers in the store. They don't know what is inside of a box whether the envelopes are good or not. We used the same envelopes last year and they were fine.
I use these envelopes to mail yearly calendars to clients. They are less than 1/4” thick and fit nicely I found that the self-stick closures often popped back open even though they were not under tension. Some arrived completely open. I have used these envelopes in the past and they worked much better. The ones purchased in December 2019 were not satisfactory.