Made by Total Scenery, these Battle Rugs are 4'x3', ie SAGA sized!
The ones we stock are green-based and gently textured. You can create hills, hillocks and all manner of rise an fall on your table-top by simply placing books, boxes or whatever you have to hand, under the cloth.
We have a few of their drop-on terrain peices too. These are available as either one peice, roughly 30cm, or two peices of roughly 15cm each.