As all the other reviewers have said the quality is excellent. You are also on the small side. My son is 8 years old (also skinny) but I ordered size 10/13 because I was tired of returning socks that were too thin or too tight. The socks fit, but make sure you select shoe size and not age when ordering (my son wears a size 4). Not sure my 8 year old will be comfortable in it next year so to say it will fit a 10-13 year old would be an exaggeration. Also, I wish they had multiple color options. Not sure if we'll be using yellow or maroon at all, it would be nice to have a pair of navy blue and black instead.
Tommy Hilfiger Girls Crop White Girls' Clothing
54 Review
Eocom Pairs Childrens Winter Animal Girls' Clothing
64 Review
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review
Thermajane Girl's Cozy and Comfy Thermal Underwear Long Johns Set with Fleece Lining
46 Review