The Skutt KMT-1027-3 has a chamber that is 22" in diameter and 27" in height. 

Standard rates apply to firings up to cone 6, though the kiln can fire to cone 10 for an additional fee. 

Firings in our studio are not done on a regular basis, so it is difficult to know in advance how long it will take to schedule a firing at a specific temperature. 

If you are working on a deadline, it is always possible to fire a less than full load on its own at the price of a full load.