A long-sleeve layer designed with running (and sweating) in mind....This is just a favorite go to shirt. It is just a great shirt for working out and even better for just lounging around (looks great with jeans!) It is light weight and easy to move in. It is just so incredibly soft and silky smooth. Excellent for layering or by itself. It is both comfortable and flattering. It has been pre-shrunk twice at the factory, so it always stays true to size, no matter how long your dry it. Also available in other colors. Measurements: 30" long Size 2 Width: 14" across under the arms Size 4 Width: 15" across under the arms Size 6 Width: 16" across under the arms Size 8 Width: 17" across under the arms Size 10 Width: 18" across under the arms Size 12 Width: 19" across under the arms