These heavy duty concrete pavers are intended for driveways while allowing plants or grass to grow through the openings and for water to drain. Each paver is about 15.5" x 23.5" x 4" (2.5 square feet) and about 50 pounds. Compare with Turfstone. These were installed in my yard for decades to provide access to an RV parking area without looking like a driveway. I have about 140 full pieces and a few partials. $10 each for the full ones.