This has probably been asked before but is there a standard for sizes?

General Yo-Yo
1

It is a bit hard to really get a good idea of size from the Oversized / Undersized description and trying to picture millimeters in my head. Is there any sort of standard or could undersized mean the size of a silver dollar and over sized mean up to as round as a double cheeseburger ?

Anyway, I have a YYF Boss and a YYF Onestar for my own personal reference if that can help with a good explanation.

2

0-50 is mini
50-53 is undersized
53-55 is midsized
55-58 is full sized
58+ is oversized

At least, that tends to be how people define the terms. Most of the terms are within a centimeter of one another, making it fairly hard to come up with a size comparison.