The Mongolian gerbil (Meriones unguiculatus) holds the title for being the largest gerbil species in the world. This species is native to the semi-arid regions of Mongolia and China. In terms of size, Mongolian gerbils typically have a body length ranging from 4 to 5 inches (10 to 13 centimeters) and a tail length of about 3 to 4 inches (8 to 10 centimeters). Their overall size, combined with their unique characteristics, makes them a popular choice as pets.
It’s worth noting that the world of gerbils includes various species, each with its own characteristics and sizes. While the Mongolian gerbil is the largest, other species, like the fat-tailed gerbil (Pachyuromys duprasi) and the great gerbil (Rhombomys opimus), exhibit distinct features and behaviors, contributing to the diversity within the gerbil family.