Progressive Mice/Rat Sizes

I just recently got a baby ball python that is currently feeding on hoppers. However in my research it states several times what you are feeding them depends on the largest section of your snake. However I am confused on what would be the next size up for feeding since the smaller ones have various nicknames for different sizes. Is there a chart or something somewhere that shows all the mice/rats sorted by size and the nicknames?

http://img.tapatalk.com/d/14/07/19/hajeqyza.jpg

That you very much! That is very useful.