Nice well made warm kids fleece. A medium fits my 51" tall 6 year old great. Jacket runs avg/short in the torso and has longer arms, I think this is how most Mountain Hardware jackets fit (my soft shell does at least). But is is warm and fits close to the body so it can be worn under his parka on colder ski days and by itself around Denver most winter days. Typical high quality you would expect from Mountain Hardware.