The Call of Cthulhu RPG has had a long life and so has spawned a variety of suitable miniatures. The two licensed ranges were from Grenadier and RAFM. The RAFM figures are still available as of this entry.
The figures are 25mm with similar figures listed simply as ‘pulp’ figures ranging up to 28mm. Pulp refers to the pre-tv action/adventure/ horror tales published in cheap magazines made of the cheapest type of paper using pulp wood. The initial stories of the Cthulhu Mythos were published in Weird Tales.
The figures lend themselves well to a variety of RPGs and there are a range of rules to choose from. Needless to say, certain figures resembling Indiana Jones, Amelia Earhart, and Sam Spade appear as a recurrent theme. Monsters from a variety of ranges make suitable antagonists.