I just happen to have my scale handy and a couple of one yard pieces of fabric. One weighs 5.6 oz and the other weighs 4.4 oz so that's big difference. Not much help I'm afraid unless you average the weight. One piece is light so I'm not surprised.
14 oz seems heavy unless that counts the package.
I weighed (2) 1/2 yd pieces and they came in at 6.3oz. together.
Lots of luck! :-D
I have a ton of fabric I want to offer but I can't find the dumb camera! Actually it's dumb me for losing it.