I am 5'6" and 210. I had two Arabians that carried me great until they colicked and passed away at ages 24 and 26 (I had them about 10-15 years each). They were larger examples of the breed, but still, they were not huge horses. I have a 14.3 stocky little Mustang that takes me everywhere, and a fairly average sized Foxtrotter. While I am not proud of my size and I am constantly struggling with it, the horses actually do seem to carry me fine. Do I wish I was smaller? Of course.