Hi, Well the Post Office has mailers small , medium and large... small is 4.95 Medium is 10.70 and large is 14.70 these are boxes and can hold whatever you can put in em up to 80 lbs I think it is... anyway that is one option... and of course there are the envelopes you can get for mailing the squishy kind they go by weight and postage is set. Hope this helps out.