Oh, I just saw a chart about that on some blog the other day. I'll dig around in my favorites & see if I can find it. I remember thinking it was a really handy chart (because I can't seem to figure out how to size my Jelly Roll Races very good).
Here's a site I just found the talks about various sizes --->
http://soooowht.blogspot.com/2012/02...big-jelly.html
Also, here are a coupld of old threads from here on the board --->
http://www.quiltingboard.com/main-f1...e-t182440.html
http://www.quiltingboard.com/main-f1...g-t181341.html