Thanks, Bearisgrey! I think....
A while ago, I was trying to figure out an approximate yardage in my stash; taking out a lot more than I wanted to and measuring, then refolding and putting away again wasn't appealing. Given that it was only for my own idle curiousity, I wasn't willing to invest the time.
Now I don't have to! Yippee!! So if I have the majorty of my stash in 12 x12 x 12 cubbies, I can estmate how much I have. As it's just for my information, a guesstimate i good enough. Oh my!