Yes, you can use the coupon on only one item or if you have two slices of the same material, you can only use the coupon once. I have bought as little as 1/4 yd or as much as 8 yards of wide backing (108") on a 40% off
coupon (or 50% off). You can only buy one thing, but there is no restriction on how little or how much. Also, too, we get 50% off on end of bolt fabric. I bought 1-1/2 yds of backing the other day at $3.99 yd minus 30% and there was another 3/4 yd at the end of the bolt and I got that for 50% off. A couple of years ago a quilting customer told me that saying "You'll always use the materiall", so I cut it for the backing on the quilt, folded the 3/4 yd neatly and put it in my stash. Turns out it is a fantastic color, good background color.
Again, I couldn't be happier with our JoAnn's. Edie