Ook van National Geographic:
The tiny skull of the new mammal Hadrocodium is only about 0.5 inches (13 millimeters) long. It is in comparison to a regular-sized paper clip (1.25 inches or 32 millimeters). The skull of Hadrocodium is the smallest of all Mesozoic mammals, and one of the smallest mammals yet known.
Illustration by Carnegie Museum of Natural History/M. Klingler