I ordered this in Red, as that is my favorite color. It is ceramic, and the inside of the mug is white. It has a base of about 2 inches in diameter and then tapers to about an inch larger in diameter at the top.
This mug would make a great gift for anyone who enjoys hot drinks of any sort. Although I ordered this mug with the intention of keeping it, I ended up giving this one to a co-worker, who didn’t have a mug for her desk at work, and was wanting one.