Mizzen + Main Halyard Button-Down Shirt size M Trim Like new condition! EUC! Performance button-down shirt with a hint of stretch. Button-Down Shirt Hidden Button-Down Collar Short Sleeve Button-Down Placket All-Over Novelty Print 4-Way Stretch Moisture-Wicking Wrinkle-Resistant Performance Fabrication 92% Polyester, 8% Spandex 22 inches armpit to armpit 28 inches total length Measurements taken flat Smoke free home/ pet friendly