Here's a general idea:
* Common house rats (Rattus rattus and Rattus norvegicus): These are the most common types of rats found in urban areas. They typically weigh between 150-500 grams and are about 16-25 cm long (excluding the tail).
* Other species: There are many other species of rats, some much smaller and some much larger. For example, the giant rat of New Guinea can weigh up to 1.5 kg and be over 45 cm long!
Here's a more detailed breakdown:
Body Length:
* Small: 10-15 cm
* Medium: 16-25 cm
* Large: 26-45 cm (or more!)
Tail Length:
* Typically: About the same length as the body, sometimes longer
Weight:
* Small: 50-150 grams
* Medium: 150-500 grams
* Large: 500 grams to over 1.5 kg
It's important to note that these are just general guidelines. There can be a lot of variation in size within a single species, depending on factors like age, diet, and genetics.