It was right under my nose the whole time.

As I was going thru my catalog for the bizzillionth time this evening, I noticed a page that I am sure I have seen many times before, but never paid any attention to.  It was a toy sizing chart on page 58.  I had seen the A-E letters in the toy descriptions, but never paid attention to what it meant.  Unbeknownst to me the letter represents the diameter and circumference of the toy.  So you know exactly what you are getting into...or what's getting into you.