These mugs are each individual and are available in various sizes, weights and handle fit. They are made of a porcelain clay and decorated in a variegated blue 'splash' pattern and covered in a clear glaze.
Safe for dishwasher and microwave.
To view video and photos with my commentary about the weight and handle, go here: https://photos.app.goo.gl/RzjkJcRh3wz8PEkN9
Note that the following are no longer available: Large #1, Medium B & H, Small E