Fits most car cup holders Dimensions: Diameter: 7 cm, suitable for most car cup holder applications. Please measure the cup groove size of your car before purchasing to avoid size errors causing you trouble. Stylish Design: The design of this coaster is inspired by diamonds, which like diamonds symbolize eternity. You will get 4 pieces of car coasters. Long-term use, heat-resistant, dishwasher safe: The car coasters are made of food-grade silicone, soft, flexible and durable. The heat resistance range is -40F to 480F, and can be used for cold or hot drinks in the car. If it gets dirty, just throw it in the dishwasher. BEST GIFT CHOICE: These unique car coasters are perfect for new car buyers, birthdays, New Years, weddings, holidays, Christmas, Thanksgiving, anniversary or Valentine's Day gift choices.