I'm 5'3" and ride a 15'1" Arab as well as a 16'3" Clyde cross. Even though I am well into middle age (OK my kids think OLD), I can still get up in the saddle with no mounting block. I can jump up on my Arab bareback, but have no hope on the Clyde X. When I was young and nimble, I used to be able to jump up on an 18 hand high Clyde no problem. Where did my spring go????
I used to love the big horses, but now because of my stature and "maturity" (meaning I'm not as energetic as I used to be), I like the smaller horses better now. Saturday, I am picking up my first pony X. I can't wait!! Now I am glad to be a little on the small side.