A brown rat is about 2.78 times as long as a mouse. Selected basis: a defined specimen of Brown rat; an example for Mouse; approximate values.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
25 cm - Body length; defined specimen.
A brown rat is a medium-sized rodent that adapts easily to urban and rural environments.
A chosen 25 cm body, excluding tail, and 350 g mass.
Nose-to-rump reference span; tail excluded. Poses and unmeasured details remain representative.
Defined examples — our methodology9 cm - Body length; example.
A mouse is a small rodent with a pointed snout and a long, thin tail.
Defined example; real examples vary. The 25 g mass is an explicit assumption, not a species average or product specification.
Nose-to-rump reference span; tail excluded. Poses and unmeasured details remain representative.
Defined examples — our methodology
There’s always another scale
Living thingsBrown rat25 cmA brown rat is a medium-sized rodent that adapts easily to urban and rural environments.
Living thingsMouse9 cmA mouse is a small rodent with a pointed snout and a long, thin tail.
Living thingsHoneybee1.5 cmA honeybee is a social insect that lives in a colony and gathers nectar and pollen from flowers.
PeopleHuman1.75 mA human is a primate of the species Homo sapiens, distinguished by habitual upright walking, language and complex tool use.
Living thingsAfrican elephant3.3 mAn African elephant is a large plant-eating mammal recognised by its trunk, tusks and broad ears.
Living thingsBlue whale25 mA blue whale is a baleen whale that feeds by filtering small animals from seawater.Side by side
Illustrative artwork · not to scaleIllustrative artwork · not to scale
Illustrative artwork · not to scale
Illustrative artwork · not to scaleGot a good eye for scale?