Oh, please! You look perfect on her...and she is just gorgeous!!!
I believe people have just bred bigger and bigger horses....to the point that a "normal" sized horse looks small to them. And some just "look" smaller than they are...but not your horse. My pony is 13.3 yet somehow "appears" a great deal shorter than my 14 h buckskin! Anyway, I just view far taller horses as too big! Ha!