The plates are cut for an ambidextrous comfortable fit. Each 10x12 plate weighs 3lbs 14oz and is a 1/2 inch thick (HALF THE WEIGHT OF STEEL) Each 6x8 plate weighs 1 lb 11oz and is a 1/2 inch thick. ** This model complies with NIJ Standard-0101.06 for Ballistic Resistance of Body Armor **. 15% restocking on all returns.