Bought these boots for my two year old in a size 11 M which fits him perfectly, he is a very big two year old 36 pounds and well over 3 feet tall. The quality of these boots is outstanding, best I have ever seen for kids cowboy boots. My son gives the boots two big thumbs up, he has worn them everyday and he loves them so much he refuses to take them off, which makes it fun trying to put him in the bath or putting him to sleep. :)