This is an XL and supposed to be worn big and loose rather than fitted. There are measurements below so you don`t have to guess , please compare them with a shirt you KNOW fits you ok , I take XL in many brands ( L and XXL in others ?? ) and I found this a bit short in the sleeves and too big in the body so please CHECK BELOW BEFORE BUYING ...... just find an overshirt you like the fit of measure that and compare with that`s below , I`m 6`2" , 14 stone wide shoulders and slim build ( godlike ;o) It has a 54" chest measured around under the arms so that is 27" pit to pit and 2 x 27 = 54. It is 27" long from the top button to hem at the front  . It is 33" from the collar to the hem at the rear . It is 17" from the cuff to the underarm seam . it is 25" from the cuff to the shoulder seam . It is 22" from shoulder point to shoulder point . Machine washable . 100% cotton with a soft heavy feel to it. Free UK P&P ( costing me £4.60 )