Our plastic art trays are perfect for classroom, daycare, and kindergartens to organize art materials, paint, crafting, science experiments, water works, building blocks, slime, art, finger painting, color mixing and more. These trays come in 6 colors, with 2 of each. They are made with durable plastic, with rounded corners make these trays easy to clean. Stacking lugs are built into the design for airflow between stacked trays, this helps prevent mold & mildew growth after washing. Our trays measure 9-1/2 inches L x 8 inches W, the perfect size for children.