Green 12-in-one marble mold is 2-sided with six molds on each side. 

The outside dimensions of the graphite are roughly 2" thick x 4-1/8" x 4-1/8".The sizes on 1 side are 1/2", 3/4", 1", 1-1/4", 1-1/2" and 1-3/4".The sizes on the opposite side are 3/8", 5/8", 7/8", 1-1/8", 1-3/8" and 1-5/8".  

Orange 10-in-1 marble mold is single sided. 

The outside dimensions of the graphite are roughly 2" thick x 4-1/4" x 4-1/4". The sizes are 12mm, 14mm, 16mm, 18mm, 19mm, 22mm, 25mm, 35mm, 42mm, and 50mm.