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: XS,S, M, L,
<br />>ASIA SIZE Shoulder / Chest/ Length / Sleeve
<br />   XS:         41cm/  96cm/   66cm/  61cm/
<br />    S:        42cm/ 100cm/   68cm/  62cm/
<br />    M:       43cm/ 104cm/   70cm/  63cm/
<br />    L:      44cm/ 108cm/   72cm/  64cm/
<br />