Brown rat
A brown rat is a medium-sized rodent that adapts easily to urban and rural environments.
How big is it?
25 cm long
Also 9.843 in
Body length · defined specimen
A little perspective
About the same scale as Axolotl.
Axolotl: An axolotl is an aquatic salamander from Mexico that retains its larval features and external gills throughout its life.
Measurements, assumptions & sources +
Brown rat
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 methodology
The marked body length is calibrated. Unmeasured illustration details are representative.
Axolotl
A representative adult axolotl 25 cm long and 200 g. Captive adults vary substantially; external gills and the complete tail are included.
San Diego Zoo Wildlife Alliance — Axolotl
The marked representative total length is calibrated. Unmeasured illustration details are representative.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
Why this measurement?
Why we use 25 cm
For comparison, this page uses body length. This is labelled defined specimen: an explicit comparison model rather than a claim that every example has the same value.
A chosen 25 cm body, excluding tail, and 350 g mass.
Nose-to-rump reference span; tail excluded. Poses and unmeasured details remain representative.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Brown rat dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 25 cm | Not recorded | defined specimen | |
| 350 g | Not recorded | defined specimen |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · Living thingsSea hare20 cmA sea hare is a soft-bodied marine mollusc related to sea slugs, capable of releasing ink when threatened.
Around the same scale · Living thingsAxolotl25 cmAn axolotl is an aquatic salamander from Mexico that retains its larval features and external gills throughout its life.
Nearest higher value · Living thingsDumbo octopus30 cmThe dumbo octopus is a deep-sea animal belonging to the genus Grimpoteuthis, recognised for its webbed arms and distinctive ear-like fins used for swimming.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
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.Living thingsAxolotl25 cmAn axolotl is an aquatic salamander from Mexico that retains its larval features and external gills throughout its life.
Everyday thingsA4 paper29.7 cmA4 paper is an ISO 216 paper format commonly used internationally for letters, forms and printed documents.
PeopleHuman liver28 cmThe human liver is a vital organ in the abdomen that processes nutrients, detoxifies chemicals, and produces bile for digestion.
SportSize 5 football430 gAn association-football ball is an air-filled spherical ball designed to be kicked, passed and headed during play.