You get 4 bags of tumblestones. Various stone types including agates, jaspers, howlites, amethyst, obsidians, hematites, and quartzes, all the main types. Each bag has around 20 stones on average so you get upto 80 in total roughly. Great for sharing out at school and learning about rocks and stones, minerals and gemstones. Good teaching material. Great price. Tumblestones measure around 12-16mm, and a few larger ones added in the mix for luck.