Prices shown are the base price for a relatively small order. As the size of your order increases, the cost of your tile will come down at set thresholds.
Cuban Collection cement tiles are the old-world standard of 8 inches (20cm x 20cm) square. It takes 2.3 tiles per sq ft. ....so, for example, ...100 sq ft is 100 x 2.3 =230 tiles.
The Border Edge and Corner tiles are also 8 inches (20cm x 20cm) square, even though they may look rectangle in some instances.
If you want to print out some graph paper gridded in 8" squares, click here. Hint: Tape together two or more sheets for larger layouts. This is really handy for border layouts. Just use colored markers on your graph paper to mark out field tile and borders.