Carmen 3 The tag says Japan M USA S. Unless you are built like the model, these things are going to be big! I am 6’5” and slim, but I work out. I train and cycle. There is no way I would ever order a Japan M or a US S if I wanted something loose. I was looking for a tight fit but I swim in these. I have lats and I still swim.There is no way this could be a Japan M. If this is a true US size S then either every American guy is built like Arnie or the obesity epidemic in the US is even worse than I thought.So don’t be surprised when you order the size you think will fit and you find them too big. It never occurred to me that I should have bought a size S!