This cup is 3.5 inches wide by 3.75 inches tall.
I throw and trim each piece on a pottery wheel. I then apply three thin coats of colored underglaze (think of this as ceramic paint) to the outside of the pot and then lines were carved into its surface.
The layer of underglaze on the outside of the piece adhered to the surface of the pot during the firing and will not come off with daily use.
Each piece has a glossy glaze applied its interior making it food, microwave, and dishwasher safe.