36 Floor/Wall tiles (9cm square)
to cover and area 30cm (12 inches) square you would need 400 tiles
the coin is for comparison and is 2cm diameter
2.5cm = 1 inch
These tiles are made from a high quality resin and are 1.5cm square, just stick them on with a PVA glue and use a coloured grout in between to complete your scene.