Sold by full boxes only:

24x48 has 15.5 square feet in a box and 2 pieces

24x24 has 15.5 square feet in a box and 4 pieces.

12x24 has 15.5 square feet in a box and 8 pieces.

Sold By piece:

2" Hex Mosaic: 0.97 square feet per piece

3x12 bullnose