They are advertised as packs of 25. So when you have a choice of quantity from 1,2,3,4 etc you expect it to be 1 pack of 25 or 2 packs and so on. I ordered 2 but literally got 2 envelopes in the post. When i emailed them they said it was a mistake and i received the other 48 a few days later. If it's a genuine mistake then that's ok, but still unsure as to whether it's one of those try and get away with it and if they complain we will send the rest of not. Anyway, actual envelopes are really good quality and came fast.