Hi Rob!
Thank you so much for asking this question, because I am sure there are so many out there with the same concerns.
As a somewhat magical sized individual myself, I can tell you that the majority of the attractions at
Walt Disney World Resort are perfectly sized for individuals of all sizes. Having said that, I will be honest, there was one time I was nervous about
Avatar Flight of Passage because my calves tend to be on the muscular side, but I can testify that all was well and I had no problem getting on and experiencing the flight first hand.
Overall, there is nothing to worry about, you will experience the attractions you want to experience and have an amazingly magical time.
Please let us know if you need any additional assistance.
Have a magical time!
Raquel