This Body Glove women's basic short-sleeve shirt is constructed with flatlock stitching and 6-oz Lycra spandex for flexible comfort. It also offers you UV protection.
Owner Reviews, Ratings, Comments and Criticism
These run in junior's sizes. I figured this out by purchasing my first from a brick & mortar store and realizing a 7-8 was considered a "medium" They work great as a rash guard shirt and should be ordered to fit like a glove (pardon the pun) Great swim/surf shirts if you get the right size.
Here's a cheat sheet to their sizing:
Size XS 3-4
Size S 5-6
Size M 7-8
Size L 9-10
Size XL 11-12