What is the biggest a mouse can get? The adult house mouse can grow to be approximately 5 ½ to 7 inches in length including the tail; they have a round body shape. House mice have very large ears and tiny dark eyes, their fur can range in color from brown to grayish-black and they will have a lighter colored underbelly.
Can mice get as big as rats? But in general, mice are considerably smaller than rats, measuring around 12 to 20 cm, while rats are about 40 cm. A mouse’s head is also much smaller than a rat’s head in direct relationship to its body. Rat heads are heavy, blunt and chunky, while mouse heads are tiny, sharply triangular, and have pointed noses.
Can mice get huge? How big can mice get? Well, as you can see from the picture above, mice can get pretty darn big. This one was removed from a customer’s garage. A standard house mouse (Mus musculus) will be about three inches in length and fairly thin.
Do I have mice or rats? Mice have thin, slightly hairy tails; rats have a thicker, hairless, scaly tail. The nose of a mouse is triangular in shape; the nose of a rat is more blunt and rounded. Both mice and rats can be brown or gray in color, but rats can also be black. Mice droppings are approximately 1/4 inch long with pointed ends.