When I order backing I have to take a complete yard, so no half yard cuts. So I order 4 yards of 108. I don't want to have to pay postage to send the whole thing to the longarmer, so I cut some off.
Twice now I have cut it in the wrong place, leaving two pieces both too short. It was the right backing but the wrong measurement.
Yes, I feel silly, yes, my stash is getting too big.