These mugs are a custom collaboration with the local potters known as Rose + Stone. They are made with layers of various muted clays then carefully glazed with a simple white inside and on most of the outside to make them food safe. Each one is unique but similar. These tumbler style mugs are dishwasher and microwave safe. They are a shop favorite. They could be used as a drainage free planter also. They measure approximately 4" tall by 3 1/2" diameter. They are priced individually.