The oil burner measures 3.95 inch wide and 4.75 inches tall. The bowl capacity for aroma oil holds about 2 fl oz This essential oil burner uses tea light candle to heat up aroma oil. Simply put a few drops of essential oil into the bowl and light a small tealight candle. Please do not leave lit candle unattended Made of glazed ceramic, this cauldron design with cut out stars for airflow is ideal for bedrooms, living rooms, home office or workplaces A great gift idea for anyone with an interest in witchcraft or wizardry *Caution: Candle and essential oil are Not included. And don't touch the surface when candle is lighted.** Spirit of Equinox Cauldron Oil Burner