I'm 14, a little under 5'1 and about 110lbs (Although I plan on losing about 8 pounds this spring/summer.) I should get about an inch taller, tops. So outgrowing shouldn't be an issue as long as I originally fit. I've been looking in the 13'2 to 14'1 range for green broke ponies I could get cheap and work with. Also, I'll need something for the next 4 years until I graduate (I'm a freshman now.) I've ridden several 16+ hand OTTBs, and while I'm perfectly comfortable on them, I just prefer smaller, stockier ponies.
So not that you've read my nice little story, how small do you think I could comfortably go? I obviously don't want to hurt the pony, or look inappropriate, so I figured I'd see what you guys think.