Review on CHUNG Toddler Little Dinosaur Boys' Underwear - Optimized Clothing for Toddlers by Todd Phillips

I bought these for my son who is 5.5 years old and is of average height/weight for his age (wears size 5 pants and boys shirts XS). I was afraid to buy a size 4t but would love to. As a result, they became too big for him to fall off while walking. They are perfect for my 8 year old who wears size 7 pants and small shirts. I compared them to my oldest son's underwear and they are the same size as the boys' "small 6/7" underwear. I think the manufacturer should update the size to 6/7.