This is one of those fun curiosities. These specimens are still being argued about by scientists. It looks like a coprolite, or fossilized poop, but these examples from the Salmon River in Washington state may actually be geological formations rather than fossils. Certainly a talking point though! Use your imagination - is it from a dinosaur, dragon, or simply an intriguing rock? It is mounted on a wooden base and will work well in 1:12 scale.
13/16 inch (2.0 cm) wide, 9/16 inch (1.4 cm) deep and 7/16 inch (1.1 cm) tall.