Ages 9yrs.-13yrs. should make use of a 9-10 inch glove for infield and 11-12 inch for outfield. I'm hard on the baseball mitts and have obtained my fair proportion over your lifetime. Young catchers may exhaust after 2 or 3 innings, each especially whether or not it's hot through. https://groups.google.com/g/baseball-batting-gloves/c/TTKAo6fRl-M