I bought several brands but these are my favorites, at least for my child. My daughter is very tall and thin for her age. She's almost 6 years old and has been weighing 40-42 pounds all year - just getting taller, not wider. They fit her perfectly but she is very slim. I would say the size is more than one size for a normal weight child than more for a child that age. I won't pay full price when there are so many brands to choose from.
Adorable TABNIX Toddler Little Girlsβ Short Sleeve T-Shirts: 4-Pack Graphic Cotton Tops for Size 2-7 Years
44 Review
Stylish Woxlica E Girl Clothing: Trendsetting Graphic Print Summer Crop Top for Teen Girls
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Amazon Brand Sleeveless Chambray Multi Dots Girls' Clothing
62 Review
Kid Nation Short Sleeve Crew Neck Heather Girls' Clothing for Tops, Tees & Blouses
52 Review
Pack Athletic Performance Basketball Drawstring Girls' Clothing
48 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
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Tommy Hilfiger Girls Crop White Girls' Clothing
54 Review