This is an original porthole window that weighs 24 pounds. The glass measures 15 3/4 x 23 1/2  inches. The outside edge of the frame measures 21 X 29 inches. The original glass has very minor wear that may include minor surface scratches, but no cracks or chips. The glass is clear, but could use a little more cleaning. These portholes have four working closure dogs that work freely. The flange on the back extends out from the frame by just under one inch.