I have mailed many quilts and have always ended up with a bulky, oversize package to deal with. Recent postal rate increases and package size constraints can make this an expensive venture, many times with added oversize package charges.
I now pack my quilt inside one of those vacuum storage bags inside the shipping container, thus reducing the bulk of the package and the size of the box required. Of course, this does not decrease the weight of the package but by reducing the size of the box required, you can avoid oversize package charges and sometimes qualify for lower rates.
I put the quilt inside the vacuum bag and slowly suck out the air, stopping frequently to shape the vacuum bag/quilt into the chosen shipping box, thus forming the quilt to the shipping box, making it as small as possible. The price for the vacuum bag is more than made up for the savings in postage!!
Great tip Lorie!