My 4 year old daughter is "unicorn size" in the sense that she can typically wear clothes for 2-3 seasons/years before outgrowing them (she still wears many 18 month old shirts and dresses). I bought these super cute mermaid print 4/5 pants but they were VERY tight and uncomfortable so we're going back. They are more like a capri leggings, exposing the panty line.
Girls' Clothing and Leggings - Govc Winter Fleece Velvet Leggings
49 Review
Kid Nation Unisex Heather Charcoal Girls' Clothing for Leggings
52 Review
Slaixiu Leggings Fleece Printing GP777 3P B 130 Girls' Clothing and Leggings
54 Review
ZukoCert Fleece Leggings Cashmere 2P B 130 Girls' Clothing for Leggings
61 Review
Hollhoff Gymnastics Playgrounds Shorts - Breathable Clothing for Girls
48 Review
Tommy Hilfiger Girls Crop White Girls' Clothing
54 Review
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review
C9 Champion Girls Supersoft Bright Girls' Clothing and Active
46 Review