I am looking for very large black polished porcelain tiles to fit behind a hob. The size they will cover is 1200 high x 800 wide. I would like a maximum 4 tiles if poss, but ideally 2. Can't seem to locate any. Help!! Failing this any other ideas for a splashback which isn't stainless steel and doesn't have too much grout. Many thanks

Do the tiles have to match up with existing tliles?
What geographic area are you in? It seems as though a professional tiler should visit before offering advise on what will and and work.

i have a pack of unused 450x450 jetblack porcelain

I saw 600 by 600 in homebase today

Nicolls & Clark (N&C Tiles) Harlow do them as 600x300 porcelain tiles.

They are jet black with a slight texture. Look fabulous..... I should know I bought them for my own bathroom

have you thought about a piece of 20mm Granite cut to the size you need?