This is Carrera Marble, a little over 25" at the widest and 7" at the opening. It has a lot of work left to do, the opening to be cleaned up at the end and the center at the radius of the curve needs to be at least a half inch deeper. The other side is a little more finished than this side. It will be displayed standing and a light from the back should show through at the center. I hollowed it as much as I am going to, that's a pretty big file for scale. It isn't a real shell so no need to get too picky. It is kind of representational. It is still too heavy to pick up but at least I can turn it over.