Slim fit style, not too much loose and especially size XL is smaller than your normal US XL.Men casual blazer---One button design, lightweight suit jacket.One inside pocket where you can put our phone or wallet.Recommended collocation --- Match with a white dress shirt, khaki pants or jeans and a pair of casual shoes.Occassions: Great for casual, Formal, Business wear and other special eventsOne button blazer, style originated from American gentleman's clothes, initially worn at celebrations, banquets and other occasions, the popular style in the 1970s.One button blazer is not mainstream in the workplace, but its free and easy temperament has always been loved by fashion people.Button: A buckle blazer button in the waist line position, buckle back highlights the waist outline, more self-cultivation, and the formation of "inverted triangle" body.This kind of style modifies the length ratio of upper and lower body, and you are worthy of entry with a good figure.