My 11 year old, 5' daughter typically wears adult medium. The medium in this dress fit perfectly. Got it for her to wear for a Marie Curie costume. The string at the neck can be pulled so that the neck opening is smaller and more modest. It's not a heavy dress, and is comfortable. It is a bit see-through so she plans to wear black cropped leggings and a black camisole with it. Lightweight cotton fabric, but doesn't feel or look cheap at all.