Underwater Galleries 2 Pc Aquarium Rock Kit is great for smaller fish tanks where smaller fish tank decor is needed. It is also great to try out the Underwater Galleries Cichlid Stone line an see how your fish like them before you get one of the bigger kits.  The kit contains one Small Cichlid Stone-   3.5" long stone and one Medium Cichlid Stone - 6 inches long. All made of sustainable, Eco-Friendly Ceramic.