WARNING! All of our tunics are measured and listed to there exact size. For example a Medium M43 Heer Tunic has a chest measurement of 42 inches. Please measure yourself underneath the armpit all the way around that will give you the best measurement. If you measure 41 or 42 inches do not buy the Medium you will not have enough room underneath to wear anything' you will have to order one size larger. If you have any questions please feel free to email or call us.