Lectro Women's John Mayer Rock Musician with Guitar Teen Music T-Shirt Size S : Chest 16.0"(Armpit to Armpit), Length 24.0" Size M : Chest 16.5"(Armpit to Armpit), Length 24.5" Size L : Chest 17.0"(Armpit to Armpit), Length 25.0" Size XL : Chest 18.0"(Armpit to Armpit), Length 26.0" Teen Girl Size, 100% cotton, soft fabric, light & thin fabric