Portland Stone Hall chimney-piece, copied from a Regency period original  

(click image to enlarge)

Aperture Height: 38 1/8” 968 mm
Aperture Width: 38 ¾” 984 mm
Shelf Width: 54 7/8” 1394 mm
Shelf Depth: 3 ½” 90 mm
Height (MAX): 51 ½” 1308 mm
Width: 58 1/16” 1475 mm
Hearth Width: 58 1/16” 1475 mm