We do not recommend these ChengNi inkstones to our collectors and we also do not recommend these to our artists for use. They are so rough, even the worst She inkstone is not as course as these stones. We only recommend these as display gift items. The five inch size is very good to use as paper weight . It's a solid piece of baked mud stone and very heavy. It cost a lot of money (usually above $20) to ship individually from China for an 8+ inch large one. Because we do not carry these in our inventory, we only offer these right before our occasional shipment at whole sale. The reason they can be sold so cheap is they are produced in mass quantity and carved by students. A lot of people in She county Huichou can carve these inkstone.