well, i think so... 

a bigger horse say 15 hh and over would suit you.

i am 4 foot something and light and have a 14.2hh horse and im a girl 

hope this helps

My Welsh Sec B (age 20) is 13.1hh and weighs about 275kgs. He carries me with ease - I am aged 23, 5ft 6 and weigh 10stone plus tack!! I often get odd looks, but I don't care!

If I had any suspicion that he was in pain or struggling, I WOULD NOT RIDE HIM.....I don't ride every day or even every week, but when I do take him out he really enjoys himself. I don't jump as high as I used to (he used to clear 3' 3" when he was 14!) or go as fast or as far, but he is fine. If he was not, I'd retire him or find a lighter rider for him. I always take care not to ride down steep hills, and he has a Veteran supplement.

I think a lot of this rider height issue is down to breeding and disposition, but where I come from, farmers used to ride Welsh Mountain Ponies to gather the sheep on the hills, and they were that tall for them that it used to be said that if they stood up, the pony could run out from underneath them! Modern showing and riding tend to dictate that a rider rides the "correct height horse for their size" but really this doesn't need to be stringently followed in real life.

Use your own judgement but bear in mind breeding, age, and what you want to do with your pony.