Pottery Barn Mason Stoneware Mugs Smooth Silky Glazed White - Set of 2. Great condition with no chips, cracks, marks or stains. They have been used and through the dishwasher a few times. They are clean inside and out. They measure 3.25" tall and 3.75" around the rim. Marked Pottery Barn Mason Stoneware Designed in San Francisco, Microwave and Dishwasher Safe, Use Caution When Heating Liquids on the bottom of each. From a smoke free home.