I bought size XL for my nine year old daughter but the crotch was just above her knee. They really fit my 5 year old. Definitely not true to size.
Amazon Essentials Little 3 Pack Shimmer Girls' Clothing in Socks & Tights
63 Review
Children Toddler Thermal Cotton Winter Girls' Clothing
58 Review
Jefferies Socks Little Seamless Organic Girls' Clothing
44 Review
Warm and Soft Wool Socks for Kids - Cute Animal Design, Thick Thermal Crew Socks for Children and Toddlers in Winter
43 Review