This is a large, bench top marble mold with 4 sizes, which are 31mm, 38mm, 44mm and 51mm (1-1/4", 1-1/2", 1-3/4" and 2") in size.

The overall graphite size is 216mm x 69mm x 35mm thick (8-1/2" x 2-3/4" x 1-3/8").