9GreenBox - Seedling Starter Trays, 144 Cells: (24 Trays; 6-Cells Per Tray), Plus 5 Plant Labels 144 cells, (will ship as 24, 6-celled trays). Equivalent to two 10x20 "flats". Each cell measures 1.5" square by 2.25" deep. Ideal cell size to transmit room temperatures for optimal root growth. Includes five plastic plant labels! (5" long). Drain holes at bottom of each cell. Top Quality, Hand-Pack by 9GreenBox