Skull designs are not just for Halloween anymore.
Many people like to wear skull theme socks and other legwear, anytime.
Take a look at this online article that shows a variety of skull theme legwear, for girls and women, with a few shown in a children's size too.
See for more details:
Skull Design Leg Warmers Tights and Stockings
There are full length tights, footless tights, thigh high socks, regular length socks, leg warmers and more. Take a look!