5.5", Terra, Square, Ella Wall Planter, Includes Hanging Holes In Back Panel, Built-In Water Minder Reservoir Drainage System Rehydrates Plants As Needed, Made From Proprietary Blend Of Resin & Natural Stone, Footed Bottom For Airflow, No Need For Saucer/Tray, Lightweight & Durable, Frost & UV Resistant, Can Be Left Outdoors Year Round, 1 Year Limited Warranty.