Hello，Because the size is Asia size in our store， I'm afraid that you regard the size as US size. please do not follow system size chart， if you are confused， you can tell me about your height and weight.  please check the size imformation in the  Description again and reply me. When you reply to me， if you want a M size， please tell me the M size is US size or Asia Size.  That would be greatly appreciated !<br /><br />ASIA SIZE available: M， L， XL， XXL， XXXL<br />Size: Shoulder Chest Length Sleeve<br /> M:  42cm/ 92cm/ 69cm/ 61cm<br /> L:  43cm/ 96cm/ 71cm/ 62cm<br /> XL:  44cm/ 100cm/ 73cm/ 63cm<br /> XXL:  45cm/ 104cm/ 75cm/ 64cm <br /> XXXL:  46cm/ 110cm/ 77cm/ 65cm