You basically treat your cast iron skillet like a pizza pan and build and bake your pizza right in your skillet. Takes about 20 minutes to cook in a 500 degree oven. I usually use my 10.25" pan for a smaller pizza but the one in the picture is in my 15". This is the pan I use:
http://www.amazon.ca/Lodge-L8SK3-4-I.../dp/B00006JSUA