A hundred troy ounces of .999 fine silver, 3.11 kilograms, from a refiner on the London Bullion Market Association's Good Delivery list, which names the refiners whose bars LBMA has accredited as meeting its standards. The brand depends on inventory, and so does the shape: one refiner pours a loaf with rounded edges and a rippled top, another presses a flat slab with sharp corners. Each carries its refiner's stamp with the weight and fineness, and most a serial number.
A hundred ounce bar is the size where the metal stops being something you hold and becomes something you lift.
