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:44cm clothes length:65cm
<br />Size S: Chest breadth:47cm clothes length:67cm
<br />Size M: Chest breadth:50cm clothes length:69cm
<br />Size L: Chest breadth:53cm clothes length:71cm
<br />Size XL: Chest breadth:56cm clothes length:73cm
<br />Size XXL: Chest breadth:59cm clothes length:75cm
<br />Size XXXL: Chest breadth:62cm clothes length:77cm
<br />Size XXXXL: Chest breadth:65cm clothes length:79cm
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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.