GrowEase 12 Replacement Domes, Set of 2 100% post-industrial or pre-consumer recycled plastic, polypropylene capillary mat12-cell seed starter is 14-3/4" L x 5-1/2" WEach cell is 2" square x 2-1/4" HGermination dome is 2-3/4" HWater reservoir holds 5 cupsGardener&#8217;s Supply Exclusive