SIZING - Measure around your neck. You must use this number to determine your size. Neck 13-13.5 is XS, 14-14.5 is S, 15-15.5 is M 16-16.5 is L, 17-17.5 is XL, 18-18.5 is 2XL, 19-19.5 is 3XL, and 20-20.5 is 4XL. Next pick a sleeve length with that body size. Generally 32/33 inch sleeve is Short, 34/35 inch is Regular, and 36/37 inch is Long. Measure the sleeve from the top center of the back and go across to the top of the shoulder, down the sleeve to the crack between the thumb and forefinger. FIT - This men’s tuxedo shirt features a Fitted cut that provides a balanced silhouette, it’s trimmer than a classic fit and fuller than a slim fit. Designed for formal wear, it includes an elastic neck button for added comfort during long black-tie events. 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.