It´s a challenge getting it thin without risking to crack it, mostly it´s about the angle when your using the chisel and hammer. All the finer work smoothing it out is with the cutter before sanding, and with this method you can go pretty thin. Thinnest area on this bowl/plate is just half a centimeter thick or around 0.18 inches. But that is a bit too thin considering it´s such a big one, it´s about 5kg..