The sizing of the socks was described as toddler size but I would say they would probably fit my 6 year old son with a foot size 1 who is becoming a kid size rather than a toddler.
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review
Hollhoff Gymnastics Playgrounds Shorts - Breathable Clothing for Girls
48 Review
Eocom Pairs Childrens Winter Animal Girls' Clothing
64 Review
C9 Champion Girls Supersoft Bright Girls' Clothing and Active
46 Review