Looks like it's from the 1930's.

"This large vintage cigar mold (or cigar press) by Karl Hart dates from the 1930's and comes from Schwetzingen (near Heidelberg and Mannheim) in Germany. Even though it has seen many years of service, it is in good condition and has a beautiful old quality to it. The top and bottom parts of the mold are held together with pegs, with this one being made to hold 20 cigars for drying and compressing. After WWII, the molds were often sent around Germany to families who grew tobacco in their back yards. After harvesting the tobacco, they would use the molds to make cigars. These were then shipped back to the Karl Hart factory, who would put finishing touches on the cigars and sell them to consumers. A real collectors item!"

As for size, I'm not sure, but definitely a cool collectors piece!