100% Cotton. Fabric: Interlock. Design: Logo, Plain. Sleeve-Type: Short-Sleeved. Neckline: Turn Down Collar. 3 Button Placket. XS: 34. 5 in. S: 37 in. M: 39 in. L: 42 in. XL: 44 in. XXL: 47. 5 in. | Lyle & Scott Men Plain Interlock Polo Shirt in Navy | Size: Medium