My son is 11 and I ordered him a size 11-12. They suit him perfectly! They sit perfectly at the waist and have a relaxed, slightly loose fit. This is typical sweatpants material, cozy on the inside but not super thick, but not thin either. He loves her. And they're a nice shade of yellow, not too bright. I would definitely get more of these in different colors!
School Uniform Pants & Capris for Girls - Premium Skinny Stretchable Clothing
40 Review
Premium Organic Cotton Girls' Clothing by Hope Henry Riding: Sustainable and Stylish Fashion
33 Review
Water-Resistant Snow Pant for Girls - Amazon Essentials
35 Review
Girls' Straight Leg Pant by French Toast
32 Review
Hollhoff Gymnastics Playgrounds Shorts - Breathable Clothing for Girls
48 Review
Dancina Toddler Leotard Flutter Sleeve Girls' Clothing for Active
55 Review
Thermajane Girl's Cozy and Comfy Thermal Underwear Long Johns Set with Fleece Lining
46 Review
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review