With a compact size of approximately 4.25 in. x 4.25 in., this Jiallo Piano Keys Coasters Set easily accommodates most standard-sized mugs, cups and glasses. Featuring a smooth and flat surface, this coaster set offers a stable foundation, preventing your drink from slipping or toppling over. Whether you're enjoying a hot cup of coffee, a refreshing iced tea or a soothing herbal tea, this coaster set ensures your drink stays securely in place.