A set of zills consists of four cymbals, two for each hand. Zills come in a range of sizes, the most common having a diameter of about 5 cm (2 in). Different sizes and shapes of zills will produce sounds that differ in volume, tone and resonance. For instance, a dancer performing with an orchestra will use a larger zill with more volume, whereas many belly dancers may use a zill with a more delicate sound, depending on the venue and whether their music is live or recorded, amplified or acoustic. American Tribal dancers typically use a much larger zill with a more mellow tone.