Shopper Size chart?
ROSA F Small would be a Toddler 5/6, Medium 7/8, Large 9/10, and XL 10/11. Mhy son is 2 1/2 yrs old and is currently an 8 1/2 so I got him the Large which is a 9/10. Fits him a bit big but I'd rather have it big then tight like the Medium 7/8. Hope that helps
Zack W Small would be equivalent to size 11 - 12, Medium to: 13 - 1, Large to: 2 - 3, and X-Large to: 4 - 5. Enjoy it! Zack.