Very nice mug, 400 ml (14 ounce) white ceramic. The reason for the low rating is that I ordered a set of 4 mugs but received only one mug. Refer to the attached photo, the box has only room for one mug. I love all of YanHouTang products, I am disappointed but mistakes do happen. If they correct their shipment, I will edit the review and give 5 stars.