- Material: Stoneware - Colourway: Semi-Matte White - Capacity:  - Dimensions: 10.8cm x 9.4cm                - Dishwasher & Microwave Safe Saucer not provided.  Made from strong stoneware clay and with a semi-matte white glaze, our Pebble Jumbo Mug is as hard-wearing as it is beautiful, with perfect, simple shapes, for every day use.