I hope this helps the international swappers, 6 yards of fabric usually fits into a USPS Global Priority bag and the cost is somewhere between $12 and $16, I think the difference is because of where it is posted from in the US. (I get a lot of USPS bags at my place :D )
I plan to send 12 FQ's which should fit into one bag.
Hope this helps Carsey
Regards
Karen