Whether you're running or training, this anti-stink short sleeve gives you the lightweight, breathable coverage you need. Designed for: Run Ventilation: Engineered Mesh is placed in high-sweat areas Fit : Body Skimming, hip length This is a used Lululemon Swiftly Tech 2.0 top that I bought used. I wore it once, and am cleaning out my closet. I’m not sure if it’s as bright white as it was when purchased, but it still has a lot of use left in it. The size tag is gone. I believe it’s a 10 or 12. It measures about 18” pit to pit and almost 29” from top to bottom. It is very stretchy. The inside has cute sayings: “SWEAT LIFE” & “I RUN FOR CHEESE”.