Ya, I labelled mine that way Barry. You must have seen my list.

Here's the official names off of GPI website:

Not sure what S.O. stands for. There are currently inlay 7 sizes
Standard (7/8”)
S.O. (15/16")
A.C.O.S. (1")
Grand (1 1/16”)
Super Grand (1 1/4")
Giant (1 3/8”)
Super Giant (1 11/16")