How are your mats made? What is the backing? Do you use an acrylic binder? It is hard to get a good idea what they look like from your site. I purchased 2 50x100cm mats for $9.99 in the states from a craft shop. They are flocked and backed on vinyl. Not the best in the world, but to get started they do fine. From this pic, your mat looks much nicer, even if of a different type, desert. Can you post a clearer pic of your grass mat?