I am currently 5'3 3/4" at 144 lbs. I ride both a 14 hand and a 14 1 1/2 mares. Horses these heights fit me better.
A pony with well sprung ribs can take up an amazing length of leg.
Have fun riding the pony!
No! I ride a 14hh, fairly stocky pony and I am 5'2" and I don't look or feel too big for her. Kinda depends on how you are built too (ie long torso or not) to know if you will look out of balance. Ponies rule.