It's a proper monster size. About the size of a small cat? It is quite heavy, but I'm just glad it's not made out of metal... I added to the base using real rocks, and there is a large amount of sand and grit on there too, so it all adds up.
Interesting story behind the huge model - apparently the data files from which the steel injection moulds were made were incorrect, so it is TWICE the size it was ever supposed to be. You can see this on the original model because there are ogre sized skulls decorating the ruins, and a treasure chest with gold coins the size of dinner plates! I removed all those out-of-scale features and decorated it with dozens of tiny resin skulls instead.