I have only ridden a handful of ponies in my life, even as a kid I was generally too tall. Though my most successful jumper was a 14.2 HH foundation QH mare. She took me up to 4'6" before I couldn't handle the thrust and nearly rolled right off the back. LOL. My current horse is 16.2 and wide, he still looks a little small IMO. I'd love to have a horse where my leg doesn't go beyond the barrel.