More than in the photo!
45mm thick:
600x600 - 2 plus one broken in half and another with a broken corner;
600x300 - 5.
40mm thick:
600x600 - 2;
600x450 - 9.
30mm thick:
600x450 - 1;
450x450 - 1 plus1 with a corner missing.
You will need to carry them from my back garden through the house. They are heavy!
Will split, but priority given to someone who wants them all and can collect soon.