I got those in red and blue for my sons for New Years'. Was hesitant as to the sizes, but at the end size Large fits well both my sons - 7 y.o.@ 63 lbs and 10 y.o. @ 82 lbs. Fits a bit long for the younger one, but I don't mind, they grow so fast - it will last for a few years. Will not fit well on heavier kids - the wrap is suited for a slim to normal sized kid.