Garden Supplies Plug Flat Cell Black 11 inches wide x 21 inches long, 50 Cells per Flat
50-cell flats are recommended for tomatoes, melons, squash, cucumbers, and for growing larger flowers, herbs, and other vegetables. With drainage holes. Cells are 2 inches x 2 inches x 2 1/2 inches deep.
Trays are made from BPA food safe recycled plastic. They are wider at the top and taper down a bit to allow for easier removal of seedlings.
I use these in my greenhouse to start seeds.
They are reusable and sturdy. They last over several seasons before cracking.