Bread-Bakers v105.n038.4

A friend of  mine has offered to make for me a non-glazed plain fired 
clay platform to use in my oven as a baking stone. I need to give her 
the dimensions and am at a loss for the thickness. I've been doing my 
fougasses on a marble slab for too long (soaks up too much of the 
oven heat). Any ideas of how thick I should tell her to make the 
non-glazed plain fired clay platform?

Thanks.
Mike's Bread
Havana