6 large rocks for painting about 3.5 inches in length. These rocks have a naturally smooth texture that provides a clean and even canvas for painting. Their flatness makes them stable for placing on surfaces and ensures that the paint adheres evenly across the entire rock, allowing for detailed artwork. The dark rock color provides the perfect contrasting background, enhancing the vibrancy and clarity of the colors used in the artwork. It also acts as a good primer for other colors.