Can anyone recommend an online retailer (or somewhere like Hobby Lobby) that sells cheap envelopes in bulk? I'm just looking for something to practice sizing on that doesn't snag, but doesn't cost a fortune either.
You can check out http://www.envelopes.com/. They have sales pretty regularly. I find that the envelopes I got from Hobby Lobby snagged terribly. http://www.cardsandpockets.com/ also have some nice envelopes that I find to be a little more cost effective. For practicing, I suggest drawing squares on practice paper the size of the envelope. This is much most cost effective than having to use real envelopes. Good luck!