Alex Katz's Blue Hat (signed), an etching from 2004, is estimated to be worth £20,000 to £30,000 and has sold at auction 2 times. During the last five-year period, the hammer price ranges from £19,000 in January 2023 to £25,766 in April 2023. This artwork has sold 2 times at auction since its initial sale in 2023. The edition size of this artwork is limited to 75.