I bought this for my husband for an 80's themed party (with matching pants) in sweater size "Asia XL = US L", and it fits him well. He's 6'0, about 175 lbs and typically buys size L (t-shirt/sweatshirts) or slim fit (in dress shirts). I was worried it would be too small since all the other reviews said to "size up", but I went with the US L size anyway to try it out.

The size was fine! The material feels very comfortable, silky on the outside and very soft on the inside, and was not too tight on him, and it was long enough for his torso. It has gone through a cold wash/warm dry and it still looks good! He got a ton of compliments on his outfit, and a lot of people said they reminded him of the Dixie cups or the social media entertainer F---Jerry, LOL. A few people said he was definitely top 5 in best outfits that night!