Size, the bigger the Kirin, the more expensive it is. The normal inch method has the conventional Geely size of Lu Banchi.
Stone: Fujian bluestone, white marble and granite are all normal.
Fine workmanship: Kirin's stone carving is a good auspicious animal. It will cost more to carve beautifully and the geomantic effect will be better.
I hope my answer is helpful to you.