65 models representing 53 species of dinosaurs and other prehistoric animals were produced for the line. Each of the models was hand-painted, ensuring that no two copies of the same model are identical. Each model was sculpted by artist Forest Rogers and authenticated by paleontologists associated with the Carnegie Museum, such as Matt Lamanna, as well as various species-specific experts. Most of the animals were sculpted at a 1:40 scale (where one inch on the model represents 40 inches on the real creature), although some models representing smaller creatures were produced at a larger scale. Models in the collection range greatly in size from 24 inches long (original Diplodocus) to only three inches long (original Dimetrodon) with all shapes and sizes represented in-between. On the underside of each model is information detailing its name, year of initial production, and copyright information.