Measurements:
Size: XS - Armpit to armpit - 13.5", shoulder to shoulder - 11", shoulder to the bottom - 15"
Size: S - Armpit to armpit - 14", shoulder to shoulder - 11.5", shoulder to the bottom - 17.5"
Size: M - Armpit to armpit - 14", shoulder to shoulder - 12", shoulder to the bottom - 18"
Size: L - Armpit to armpit - 15.5", shoulder to shoulder - 13", shoulder to the bottom - 20"