Shirts are identical sizing to footjoy / Titleist, PGA of America, Ralph Lauren, etc. They run a size larger than some other brands like Travis Matthew, Original Penguin, etc. (so our L is comparable to a Travis XL). It’s annoying that it isn’t more consistent but not much I can do about it. What gets really frustrating are the brands that have different lines and the sizing isn’t consistent, which tends to happen when they produce some stuff out of China and then other products out of South Korea or Vietnam.