Single Curve, Swimmer Cut, Alumina Ceramic Torso Plates (Coorstek, 98.5% Purity Aluminum Oxide). Size: 9.75" x 11.75" Nominal, Single Curve Shape Ceramic-Swimmer Cut. Thickness: 9.5mm (0.374 nominal). This listing is for the CERAMIC COMPONENT ONLY-NOT THE COMPLETED ARMOR PLATE.