I’m 5’8” 180lb and I always use size Medium so I decide to follow the vendor instructions and I got size Small and it fits perfect (it’s Slim Fitted). I also got two shirts that i like in size Medium because they don’t have them in a Small size and the Medium size runs like a Large Slim Fitted so i will probably bring them to a Tailor. The material is soft, fresh and elegant.Remember that these shirts run big, Fitted on top and slimmer at the bottom. If you have a belly go for ONE size up and if you are shorter than 5’7” the shirt will be too long for you if you like to used them outside your pants.FOLLOW THE INSTRUCTIONS 100%!If you take a shirt that fits you best, lay it flat, buttoned and measure it from armpit to armpit and compare with sizing chart.Looks and fits good! Material is kind of cheap feeling but overall I like it .Nice fit. The material is a little stiff, but it washes great. Overall very happy with purchase.ordered a 4x and I usually wear 3x and it fit great!!!It was greatFrom now on this will be one of my favorite shirts for dinning out ...Very good material. Order size up. Has a little stretch .My husband has a liitle tummy. The talior fit really help with that. Good buy. You will look good and eye catcher?????Beautiful quality try to order a size up for comfortability they tend to run a bit small. The shipping is fast would definitely buy off them again.