The size chart said a 10" foot is a size 8 boot. I wear a size 10 shoe. I think a size 9 would have worked. I read reviews that said the boots are big and I foun that to be true as well. I'm 6'2", 235 lbs and the boots were big and heavy. Being heavy wasn't a problem for me but there's a lot of room in the boot. I Think this boot will be good for some and not so much for others.