Choose between two options for your car coasters: High-quality Neoprene, with anti-wrinkle, moisture-absorbing, and anti-skid properties. Each coaster has a diameter of 2.75 inches. Alternatively, opt for the water-absorbent Ceramic coasters with a diameter of 2.56 inches. Make sure to measure your car's cup holder diameter before ordering. Sold in sets of 2.