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).
Slaixiu Leggings Fleece Printing GP777 3P B 130 Girls' Clothing and Leggings
54 Review
Adorable and comfortable Splendid girls' leggings for kids and babies
80 Review
Girls' Clothing and Leggings - Govc Winter Fleece Velvet Leggings
49 Review
Kid Nation Unisex Heather Charcoal Girls' Clothing for Leggings
52 Review