Seed Starting Trays,72 Cell Propagation Trays (Qty.5 ea.) Greenhouse Supplies Includes: 5- Trays and 5- 72 cell plug trays Flats measures approx. 21"x 10.5"x 2.5" deep, sold as standard 1020 flat 5-72 cell Trays, total cells 360 Each Cell Measures 1.25" diameter and 1.75" deep, drain hole .50" diameter Plug flat measures 21.38" x 11.05"