I have a stone fireplace surround that measures 63 inches wide, 40 1/4 tall and 3 1/2 deep. The opening is 33 wide by 22 tall. There is also the piece for a hearth it is 63 wide by 17 deep. And 2 pieces for the return. This unit is in really good shape and is heavy. Call email or text 250 882 2862