4th of JULY decorated envie

I'm curious about how swaps like these work. Do you just have to find envelopes that are two different sizes so that your smaller ones fit inside the larger one? What size envelopes are usually used for doing something like this?

Hi xxsquigglesxx, Generally you would mail the envelope that is decorated itself so that the Post Office , neighbors and the recipient all get the thrill of the creation. You should keep this in mind and decorate flat and secure. I have gotten many versions all fine this way. Occasionally someone will tape over the whole thing in clear tape, this isn't necessary but some prefer to do this. When I set one I was worried about I used a heavier clear bag taped fat and tight over the entire creation so you still had the fun of seeing it. As for size, some swap require a specific size envelope, some don't , it's up to the coordinator. I feel you should use what is right for your artwork and legal to mail. They don't really accept teeny envelopes anyway. Hope you join in :0)

Sorry all I assigned partners on the morning but I guess the key was sticking (again). I just checked. Re pushed now and made sure really assigned.