These are my 3 1/2 year old grandsons new favorite boxers.  They aren't bulky like the loose fitting size 6 regular boxers that do not come in a size 4 that he needs.  He liked them so well that we had to order another set so we could wash the others and he would change them!  The third pair grandma is keeping for a spare at her house.  We will now have 6 pairs instead of 3!