Years ago I was getting ready to quilt a flimsy, this was back when all I used was creme and/or white threads. Too chicken to use a color thread. Anyway, my program I use to lay out the patterns gives me the amount of thread yardage. I read it wrong, thought it said yards not feet so I ordered 7 spools each of #2021 and #2024. To my surprise afterwards I realized I only needed 1 spool. I don't use white or creme often these days so still have a lot of spools left. I use one on my spare machine for piecing just to use it up. Still laughing at myself for that mistake.