They say the shoulders make the man. Height does not affect your shoulder length. I've seen people a lot shorter than me and htie length is larger longer than mines. I think shoulder length helps a bit in badminton in terms of power, but i'm interested in your shoulder lengths. Just curious. Lol. Mines is roughly 17 inches long and I'm 5'10". I fit most medium shirts perfectly. I've seen people and have friends who are 5'7" and have shoulders length of 20 around 20 inches. I would love to have longer shoulders. What's your shoulder length? Are you one of those people with broad long shoulders? Lol.