What size pizza pans and what brand for new shop

I would like some guidance on the size of pizza pans I should buy. I plan on offering Sm Med Lg. Also if they are bought new any tips on seasoning the new pans

Go to http://www.pizzatools.com/ their pans start at 6" and go up to 18" in one inch increments. You can get them in a tough coat or season them your self.
I Have 4 sizes 8", 10", 12" and 14". I have 50 each of the 8" and 10" and 100 of the 12" and 220 of the 14". I did my own seasoning as it is less money. To season the pans I brushed them with canola oil and ran them through the conveyor oven for 12 minutes at 450 degrees then let them cool.
If you are looking for used pans PM me as I have just changed some of my sizes and will sell what I don’t need at a fair price.