I use all colors and have the huge white that covers the 72in table and a couple of the huge geen ones I use to put tog before I got the big white one. I have a few of the green smaller for paper piecing to use right buy my sewing machine... I did buy the self healing one a few years ago that has a tool you scrape ona it re heals and pulls out any fuzz... and you can also cut circles and curves and the fabric dosent move on it... they are great but I couldn't aford the really big one... but for strip etc it is great....
ConnieF