Thanks everyone, I went to the PO today and the lady gave me a flat rate bubble envelope and said you can only get them on line. I was on-line and ordered the "flat rate package", and it didn't include a bubble envelope, only the cardboard ones, with the boxes. I will see how I do with the bubble ones, as they seem to hold more than the cardboard ednvelopes. Favorite Fabrics, I still don't see how you can get even close to 8 yards in those 9 1/2 x 12 1/2 cardboard envelopes!! I have even put it in zip lock bags and sucked all the air out, and still can't get more than 3-4 yards in it!