Popular Nike running sleeveless top, an Alpen-exclusive model of the Miler Tank. Size is men's S. Please check the specifications such as standard dimensions yourself or try it on at a store. I have moved and don't have a scale, so I appreciate your understanding. Regarding the fit, I usually wear AeroSwift S, and the Miler Tank in size S also had a perfect fit. This is just my personal experience, so please confirm the size yourself as mentioned above.