It comes in a range of sizes but I went for 6x4. It is made from a printed 2mm thick neoprene material - its basically an enormous mouse mat . I comes with its own carry/storage bag as well.
It has a range of pattern and features on it too so its not totally uniform. after it had been laid out a while it smoothed out nicely - and was very non slip.
I looked at range of reference pictures and saw plenty of U.S city pictures with cobble effect - so I am more than happy to use it as a base - I will just need to get some more colour into the building that need to be constructed to break the grey up i think. .
Service was very good from UrbanMatz - ordered on a weekend, arrived the following Thursday well packaged ,with tracked delivery - and good communications from the Vendor - not sure overall on value compared to other manufactures - but it felt about right - and with a good Euro exchange rate I am happy. I need to source an alternative wall back drop as well now. But Serenity City is back on the production line.