Summary
Maps in R2DA come in all shapes and sizes. This is a comprehensive ranking on the size of the maps.
The Map Size is defined as the total area playable if all the maps are super-imposed on each other. Only the area from a bird's eye view is counted; not the total area from a vertical viewpoint. Water is only counted towards the size of a map if it is safe. Terrain is also only counted if it is safe (for example, it doesn't trip you, it isn't lava and it doesn't kill).
Map size
Very Small
Small
Medium
Large
Massive