Improve the impression by loosening the sleeves. Generally, short sleeves should cover more than half of the big arms, and the appropriate sleeve length should cover the big arms. However, it will be difficult to control the length of short-sleeved sleeves beyond the arm joints, so I personally suggest that the sleeves should be as long as the arm joints. Because the cuff circumference generally increases with the increase of sleeve length, you can ignore it if you like Korean collocation, but if you don't like Korean collocation, you'd better pay more attention to the cuff when you buy and try it on.