This tailored and performance-ready men’s Apt 9 slim untucked, fit button down shirt, perfectly complement your professional wardrobe. This button down crafted in an untucked, slim fit, detailed with a chest pocket, and features sewn cuffs for a sharp look. neck size of 15.75" - 16.5" Chest: 40.5" - 43.5", Waist: 34.5" - 38.5", and Sleeve: 34.5" - 35.5"