I need a baking stone

Toast

Hey bakers i need a baking stone for my new convection oven here are theinternal Oven: 415(H)x 580(W)x 430(D)mm.mesaments I live in uk do amazon UK ideally pleaser let me.know know a stone that size or just less 

I don't use a single stone.  I use 6" x 6" unglazed quarry tiles.  They're cheap.  Buy as many as you decided fit onto your baking surface.

I use a 12 inch square unglazed quarry tile.  You can buy them at most independent tile suppliers or flooring specialists.

I searched on the 'net and found a few companies that will send you a single tile sample for a couple of pounds or so :)

It works just fine :)

Locate a kiln supplier in your region. The shelves of kilns make great baking stones. Buy a shelf that leaves at least 25-30 mm clearance around the edges for circulation. Buy the thickest one you can afford (can lift also).

Wild-Yeast

I tried unglazed quarry tiles but they cracked and broke very quickly. I then went to a guy who sold off-cuts (i.e. leftover bits) of granite counter top. He cut me two pieces to fit my oven. They're 1.25 inches thick and work a treat. They hold the heat forever. Heavy, though. And I use them rough side up, rather than the polished side, which dough might stick to.