Clear polystyrene plate features deep uniform wells and include lids. Each well has an alpha-numeric marking. Non-sterile plates are individually wrapped in a plastic bag. The 24-well plate measures 5" long x 3-1/4" wide x 7/8" high. Flatbottomed wells are 5/8" deep and approximately 10mm in diameter. The 96-well plate measures 5" long x 3-1/4" wide x 5/8" high. U-bottomed wells are 7/16" deep and approximately 6mm in diameter.