I'm 5'5 and Danni is 14.3...now my legs dangle a teeny bit, because they are really long, but that doesn't necessarily mean I'm too big for him. I've ridden 14hh horses before, and look fine, as long as they have some substance.
I'm 5'5", 120lbs and I ride a 14.2 appy. And my legs go past her belly about 3 inches when I'm bareback. I like that she's short because there is less space between me and the ground, which I visit a lot lol.
I am 5'8 and used to ride a pony mare that was 14.3. Now I have a mare that 16.2 and it so hard for me to get on her lol I need to get in to shape. But my point is. I miss my little pony at the time I thought I was to big but now I reliaze she was the perfect size for me. Even thou she has long passed and I would never give up my current mare if I had to do it again I would go smaller