Each painting is hand-selected, a good size for shorter messages, small writing or symbols. Painting on a smooth non-porous surface is much easier than a rough, pitted surface. Our stones are very smooth. Smooth rocks picked and sorted so you can create personalized art creations. Feature - Color: Black. - Material: Stone. - Size: 5x4x2.5cm. - COLOR: for painting, smooth with no wax which makes artwork really pop Ready to paint straight out of the bag with no buffing or prep work needed. - ASSORTED SIZE AND SHAPES: Stones allowing artists to give different personality to each creation of art. - GIVE BACK TO THE COMMUNITY: Share online with countless others, hide your creations for others to find or display in your own home and garden. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand