“Having bought the white and grey & black and yellow versions of this shirt for myself in medium extra tall, I bought this as a birthday gift for my 6'2"/6'3" brother figuring that he'd appreciate a long sleeved light weight summer shirt. Based on past purchases and the sizing guidelines, large tall has usually worked out well for his 38/39 sleeve. This shirt has yet again proven to be a happy accident as it ended up being a 39/40 sleeve, so it will guaranteed fit him. The colour looks great and I am looking forward to giving it to him. Thanks again American Tall. . Stay safe and stay awesome. ✌️”