Swity Home 10 Pack Silicone Drink Coasters, Great Grip for any Occasion & Drinks, Set of 10 (Black) Size: diameter approx 4 inch, large enough for any drink Delightful modern eye-catching design is easy to clean, and works for hot and cold drinks, Lightweight, ultra durable, non-sticky and odor-free, dishwasher safe For coffee cup, wine glass, beer bottle and all other beverages, ideal for any occasion & drinks Ideal for sailing on a boat, having a picnic with your family or friends and all other outdoor activities