MOGU Men's 1 Button Center Vent Wool Blend Blazer Jacket This is Asians size. Please choose the right size based on your chest measurement from the size options. If your chest is 42", Our size US L-Chest 42"(Tag Asian Size 5XL) would be a snug fit. Please check the size chart detail image on the left for more specific sizing information Center Vent and 2 Flap True Pockets Fully Lined with Inside Pockets Single Breasted One Button Opening 65% Polyester 25% Viscose Rayon 10% Wool