This shield boss or umbo comes in 14g iron making it fully functional and ready for battle.  To mount your boss there are eight pre-drilled holes and included is mounting hardware. The dimensions are 7.90x 7.90and large enough to place a grip behind it.  The back side has a glossy black finish.  The front features antique brass plating.  Outer Rim Dimensions: 7.90 x 7.90 Inches. Backside Inner Dimensions: 5 x 5 Inches.