This piece is from Ziterdes a German company that does 25/28mm terrain in hardfoam. I picked this up a few years back from Noble Knight games but didn't do anything with it. While looking at it recently it seemed to me that it would fit/scale well with 15mm. In the picture are 15mm Demonworld Empire figures and a Demonworld Ogre. I think it works well. Checking Ziterdes site it appears the piece is oop now which is a shame. Rough dimensions on it are 12 x 8 x 4 inches.