well, I'm sitting in a parking lot, shivering cold, with a sketchbook, dim light and a pencil... a few pencils... so I drew rats x3

the smallest is the lowest of their 'classes' though they all generally respect eachother, the smallest are most always the lowest class. they steal (not from other rats, unless the times are TOUGH) and cheat. the bigger ones, the giant rats, are more respectable, and can sometimes be around humans and things. though they quickly get fed up with the yelling and shunnings, and lose it.

the bigger ones are noble rats. are like nobles, they're generally very respectable, and can be counted on for most things. they're good at keeping their composure, but are even more devastating when they're angered... which takes alot.

The rat lords are rather scary, when they're pissed they can take an entire city with no problem. I havne't completely worked out sizes, but a giant rat (if they stand on their hind legs) are about as tall as a short person (about 5 ft)
a rat is about a foot or 2 tall, a noble rat is maybe 6 to 7 feet. and a rat lord is a whopping 9 ft to 10 ft.

that's the classes and...