If you enjoy drinking a "hearty" cup of coffee without it getting cold or going back for refills, then this mug was made for you. Its the perfect size for a nice hot serving of your favorite java, satisfying and eye-opening all at the same time. Not too large, not too small, but just right. In fact, its perfect! Constructed of stoneware. Microwave and dishwasher safe. Set of 4 perfect coffee mugs, each holds 10 ounces.