MOGU Mens Slim Fit One Button Casual Blazer Jacket This is Asians size. Please choose the right size based on your chest measurement from the size options. If your chest is 44", our size 6XL would be a snug fit, Check sizing info in description below Shell 55% Cotton 45% Polyester, Lining 100% Polyester Dry Clean Only One Button Closure and notch lapel Check out our other great products by clicking the brand link above. Your support is greatly appreciated!