10*10 square feet

One Follow-up question.. Is there any strength issue with 20mm Granite slab over 40mm Granite.. Are the 20mm granite slab prone to chipping or crack on normal usage.. Usage would be like, chopping vegetables, keeping hot vessels,.. The normal usage what happens in normal indian kitchen.. I just want to be sure that I decide based on experts judgement (like you), as people are just throwing their opinion based on their guess...

It depends on various factors like the size of the building, distance between pillars, and floor to floor height. But yes, as Joitree says, this is not something you can just find online. You have to consult a professional structural engineer

Hi Shivam, the best size is either 300mm x 300mm or 600mm x 600mm. The reason is - smaller the tile size better the maintenance of slope to achieve drainage of water. Also, use anti skid tiles to avoid accidents.