Hi!
Welcome!
Boo's a teapot. 6 yrs old, 10 1/2 lbs. I'm terrible with measurements, so work with me here. I'm not really sure how tall he is, but he is 13" from base of neck to dock of tail & has a 15" girth. I know this because I measured him for jammies.
He is longer then taller, so I'd say he's maybe like 10" tall. I'd say his legs are on the short'ish side, so if your boys seem to have long'ish legs then they may end up taller then this.
Post some pictures when you can, ok.