FASHION BLACK SLATE COASTERS - Made of all natural slate, provide you with a high-end coaster, non-toxic and odorless, some edges are a little rough, which adds beauty. ANTI SCRATCH AND STABILITY - The soft bumper at the bottom provides stability and prevents scratches, and the slate with four felt pads protects the counter and desktop from stains. PERFECT MATCH - Each round slate coasters for drinks measures 4 inches in diameter, making it just the right size for all standard cups, mugs, glasses, and drink containers. EASY TO CLEAN - Just rinse the coaster with water and wipe it with a cloth, but for heavy stains, you can soak and wipe them with detergent or baking soda. WIDE OCCASION - Not only can be used as a stone coasters, but also can be used in Engraving, Painting, Drawing, DIY Supplies, Handicraft, Home Decorations and so on, it will become a great decoration of your daily life. size: Diameter about 10cm Material: natural slate stone colour: Black Package Contents: 6 x Coasters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.