I bought a Large. If I had been able to try on before buying, I would have opted for a Medium. I am 5' 8", 138 lbs., 36½ chest, wear size 10. I figured I could always alter if too big but not if too small. The shirt is VERY light-weight material and I notice no moisture retention following step/fitness class. It has a designer seam down the center of each breast area. It comes to my waist; I was hoping for longer. But...one could wear it bare midriff by rolling up hem as it has lots of elastic in material and will stay up & won't be bulky as it's so "fine" in texture. It's definitely comfortable...you don't know you're wearing it as it feels so light and like your skin. It's definitely well made. It has "their" logo sewn on back lower hem which limits it to gym wear. It was a little pricey, but I'm willing to pay for quality. I believe this item can fall into that area. So, bottomline, if you want a quality exercise shirt that breathes with you and in a basic style, this qualifies. Hope this helps others make buying decision.

This shirt is very comfortable, wicks well and looks great!

This is a good quality shirt. It fits well but is slightly short and comes just to the waist.

This is my favorite workout shirt!! It is so thin and breathable. I love the 2 seams down the front of the shirt and the gym hardwear logo that is stitched on the bottom of the back of the shirt. I will definitely buy another one of these shirts!!!