Features: Specifications: Material: natural stone Color: black， dark gray， light gray， white and beige， red(the new arrival) Item size: about 2*2*2cm/ 0.78*0.78*0.78in (+-2mm tolerance as cut by hand)， the dark gray one is smaller: about 1.8*1.8*1.8cm/0.71*0.71*0.71in ( +-2mm tolerance) Itemweight: about 18-22g per stone Usage: Clean the stones， stock them in your freezer for 4 hours above， serve 3 stones to your drink(liquid height no more than 1 stone height， normally 3stones only serve 60ml/2 fl oz liquid)， stay for a while and enjoy your cooling drink! 9stones in a velvet bag and then in an OPP bag to be a set Packaging: Package includes: 9* stones 1*velvet bag Note: If you choose "color at your choice"