I went to my LGS today and impulse purchased some sandbags. These are really neat terrain items. Each piece measures 145mm in length and 25mm in height at the tall points. They come pre-painted. A pack costs $35.00 for six pieces. You can also buy a corners pack. The company that makes them is called Pegasus Hobbies, website www.pegasushobbies.com
I am really impressed and I intend to buy some more. I put a couple of 25mm figures next to the sandbags to give them scale. These figures are mounted on Games Workshop round slotta bases so they stand a bit taller than the popular flat wooden bases.