Transparent ten compartment sorting tray with lid is perfect for using on a light table for sorting and counting activities. Can also be used as a ten frame or for storage. Outer Dimensions: 17" x 7.9" x 1.6" (43cm L x 20cm W x 4cm H). The 10 spaces on the discovery tray are 2.75" x 2.75" x 1.2" (7cm x 7cm and 3cm deep). Counters not included.