Alpha Size. 100% Cotton. Your Waist (in.). 24-26 26-28.5 28.5-31 31-34 34-38.25 38.25-42.5 42.5-46.75 46.75-51. Your Chest (in.). 30-32 32-34.5 34.5-37 37-40 40-44 44-48 48-52 52-56. Your Neck 14.5-14.75 14.75-15 15-15.25 15.25-15.75 15.75-16.5 16.5-17.5 17.5-18.5 18.5-19.5.