Size Small: My daughter usually wears a size 6-7, fits well. I was so happy to see that Btween only sells their pants. These are the only pants my daughter will wear, but she has never been able to find soft pants that are sold separately. They're made of thinner material, have a lot of stretch, and are slightly raised at the waist (which my daughter likes so her underwear isn't showing).
ZukoCert Fleece Leggings Cashmere 2P B 130 Girls' Clothing for Leggings
61 Review
Girls' Clothing and Leggings - Govc Winter Fleece Velvet Leggings
49 Review
IRELIA Girls Leggings Modal Spring Girls' Clothing for Leggings
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Spotted Zebra Girl's Disney Star Wars Marvel Frozen Princess Leggings: Unleash the Fantasy!
46 Review
C9 Champion Girls Supersoft Bright Girls' Clothing and Active
46 Review
Thermajane Girl's Cozy and Comfy Thermal Underwear Long Johns Set with Fleece Lining
46 Review
Dancina Toddler Leotard Flutter Sleeve Girls' Clothing for Active
55 Review
Pack Athletic Performance Basketball Drawstring Girls' Clothing
48 Review