100% post-industrial or pre-consumer recycled plastic, polypropylene capillary mat 12-cell seed starter is 14-3/4" L x 5-1/2" W and holds 1-1/2 quarts of seed starting mix 24-cell seed starter is 14-3/4" L x 9-1/4" W and holds 3 quarts of seed starting mix Each cell is 2" square x 2-1/4" H Germination dome is 2-3/4" H Water reservoir holds 5 cups (12-cell kit) or 10 cups (24-cell kit) Gardener's Supply Exclusive