1. Installs in seconds to any clean, non-pourous surface 2. Simply press the bottom suction cups to window at desired height. 3. Extend the supports and adhere the upper suction cups. 4. Machine washable cover is easy to remove. Size(Please allow slight deviation for the measurement data,thanks for your understanding) Length:about 55cm/21.65" Width:about 39.3cm/15.47"usa