Measured from the outside edge to outside edge, this diver recovered 20 1/2 inch porthole is in unrestored, unpolished condition. The original glass remains in place and measures 16 inches wide. The original glass has no cracks, but you can expect some minor surface scratches.  The glass is not crystal clear, as it was recovered from a working vessel. This diver recovered 20 1/2 inch brass porthole weighs a hefty 48 pounds!!