I would recommend going up a size. The shirts fit my daughter snugly but appear to be of good quality. I bought a large for my 7 year old who wears a size 10. I had to take the XLarge.
Shamrock Girls' Summer Sleeve Shirts - Girls' Clothing and Tops, Tees & Blouses
44 Review
Spotted Zebra Girls' Short-Sleeve Flutter T-Shirts: Amazon Brand for Fashionable Kids
43 Review
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