I'm afraid that you regard the size as Euro Size and US Size.please do not follow system size chart !!!<br />  if you want make a very correct choice you should choose by the size chart at the Second image !!!<br /><br />>available: XXS，XS，S， M， L， XL， <br /><br />>ASIA SIZE      Chest/ Length/ Sleeve<br />   XXS:         51cm/  59cm/    56cm/ <br />    XS:        53cm/  63cm/    57cm/  <br />     S:       56cm/  67cm/    59cm/  <br />     M:      61cm/  70cm/    60cm/ <br />     L:   63.5cm/  73cm/    62cm/ <br />    XL:    66cm/  76cm/  63.5cm/