The material is so soft and it has plenty of stretch to it! It is 96% rayon and 4% spandex. Measurements: Sm: 18" from neck line to bottom, 25" from top of shoulder to bottom, and 17"-18" from armpit to armpit. (Stretchy material so measurements ma vary). Med: 20" from neck line to bottom, 25" from top of shoulder to bottom, and 17"-19" from armpit to armpit. (May vary). Large: 20" from neck line to bottom, 26" from top of shoulder to bottom, and 22"-23" from armpit to armpit. (May vary)