Most of our Fancy dress costumes are made from fairy stretchy material and have been designed to fit a wide size range. Costumes marked (M - L) are just one size that should fit a man approx 36 " - 44" chest and 30 " - 38" Waist with a 33" inside leg. Some costumes are not so strechy and are in sizes marked below. Unfotunety we dont have many X L sizes so you'll have to stop drinking so much beer and lay off the pies for a while OR buy one of our more forgiving inflatable costumes.