Due to a pituitary issue when I was younger I have maybe a bizarre world record of the smallest feet and hands on a fully grown man. My feet and hands are normal looking but very small. They were tiny as a baby and just never grew that big. Thought you all would find it interesting - I know it makes for good chat at parties!
My partner has size 15-16 feet, depending on the shoe manufacturer. Can confirm, he smacks his toes and feet into things all the time.