I've been selecting yardage from my stash, and I've been cutting it 10.5" WOF and cutting that in half and trimming selvages, so mine are usually around 10.5x 21". This does take 3 yards of fabric (after washing) but if you can only cut three widths going the other way, you'll need over three yards anyway. I've run into too much newer fabric that is closer to 42" before washing. But then I also have some vintage fabric that is way less than that!