Description Dark Blue Oval Ceramic Humidity Tray Approximate Dimensions 6" Outside: 7 1/8" x 5 3/8" x 1" 6" Inside Base: 6 3/8" x 4 5/8" x 3/4" 8" Outside: 9" x 6 1/2" x 1" 8" Inside Base: 8" x 5 1/2" x 1/2"