SIZING - Measure around your neck first. Use your neck measurement to choose the body size: 13-13.5 = XS, 14-14.5 = S, 15-15.5 = M, 16-16.5 = L, 17-17.5 = XL, 18-18.5 = 2XL, 19-19.5 = 3XL, and 20-20.5 = 4XL. Then choose the sleeve length within that body size. Generally, 32/33 is Short, 34/35 is Regular, and 36/37 is Long. Sleeve length is measured from the center back of the neck, across the shoulder, and down the arm to the base of the thumb. FIT - This shirt is labeled Fitted by the manufacturer, as shown on the garment tag. It is not a Slim Fit or Extra Slim Fit shirt. The fit is trimmer than a Classic Fit shirt but fuller through the body, chest, shoulders, and waist than a modern Slim Fit dress shirt. Customers who want a very close, tapered shirt should not expect this style to fit like a Slim Fit shirt. The elastic neck button adds comfort for formal events and long wear. FEATURES - This shirt includes a wing collar with rear guide loop, one quarter-inch pleated front, adjustable French cuffs, and a placket that can be worn with studs or buttons. Plastic black studs are included for convenience. While suitable for temporary use, most customers prefer to use their own formal studs. The design accommodates five studs for a complete appearance even without a cummerbund. This shirt combines the smooth look of cotton with the durability and ease of care of polyester. ACCESSORIES NOT INCLUDED - Cufflinks and neckwear are not included and should be selected separately to complete the formal ensemble. CARE - Easy to maintain, this fabric may be machine washed warm with like colors or dry cleaned. Tumble dry low and press with a warm iron as needed. Avoid chlorine bleach to preserve fabric quality. This Sir Gregory tuxedo shirt is designed for formal and black-tie occasions. Made from a 65 percent polyester and 35 percent cotton broadcloth blend, it combines durability with a smooth finish that is easy to care for. The shirt features a wing collar with rear guide loop, ¼-inch pleats, and adjustable French cuffs. The placket accommodates studs or buttons, with five buttonholes included to provide a finished appearance whether or not a cummerbund is worn. With a Fitted cut, this style offers a silhouette that is trimmer than our regular fit. An elasticized collar button adds flexibility for comfort during extended wear. This shirt is well-suited for weddings, concerts, graduations, and other formal black-tie events.