I put a 'patch' of muslin on the right upper side for the stamps.
Instead of a zipper or resin snap I made the envelope with ties. I tied them in little tiny bows and tucked them inside of the envelope.
Next time I will use a zipper and tack it into place so that no one opens it before it is delivered. I really thought the mail lady would flip out and tell me about some sort of regulation that I didn't follow. Instead, she smiled really big and told me how pretty it was. It was only $1.30 to mail :) I'm not sure if it arrived safely or not but it was SO FUN to make. I will definitely be doing this again!