YUNNAN YUNZI STONES:- weight 2.7kg(6lb) 181 black and 180 white Authentic single convex Yunzi stones included, I will give you 10 spare stones if you need them in fulture, originate from Yunnan Provence,China.Each stone measures 6mm tall and 22mm wide (approximately 0.24" x 0.87").Yunzi stones have a balance and a deeply rich color that are instantly noticeable. They also leave an audible''snap''as you place them on the board.The texture,symmetry,and precision of these stones are superior.