3 Mix New Square Plastic Humidity / Drip Tray for Bonsai Tree & House Plants - Poly resin injection molded. - Durable, attractive, economical. - Made in China OUTSIDE DIMENSIONS: 7"x 7"x 1.25" 8.5"x 8.5"x 1.25" 10"x 10"x 1.5" INSIDE DIMENSIONS: 5.75"x 5.75"x 1" 7.25"x 7.25"x 1" 8.75"x 8.75"x 1.25" COLOR: Brown USAGE: - Do not let the bonsai pot seat in water. - 3.0 lbs. rocks are enough to cover one 10"x 10"x 1" humidity tray. - Do not allow the water level to be above the pots drainage hole(s). - Evenly cover the humidity tray with these pebbles, and fill with water. - In order to provide a humid environment for the bonsai tree, keep some water in the tray at all times. SHIPPING: Combined shipping not available on this item. NOTE: All measurements are approximations and may vary by 0.25"