It is US size.It is man size,but man and women both can wear it. 
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<br />Size XS:  Chest breadth:46cm    clothes length:65cm
<br />Size S:  Chest breadth:49cm    clothes length:67cm
<br />Size M:  Chest breadth:52cm    clothes length:70cm
<br />Size L:   Chest breadth:55cm    clothes length:73cm
<br />Size XL:   Chest breadth:58cm    clothes length:76cm
<br />Size XXL:   Chest breadth:61cm    clothes length:79cm
<br />Size XXXL:   Chest breadth:64cm    clothes length:81cm
<br />Size XXXXL:   Chest breadth:67cm    clothes length:83cm
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<br />Note:
<br />Please compare above detailed size with your measurement before purchase.
<br />Please allow 1-2cm differs due to manual measurement.
<br />Due to the difference between  different monitors,the picture may not reflet the actual color of the item.
<br />We guarantee the style is the same as shown in the picture,but not the same performance on different bodies as on the model.