Application: This mini thumb piano is a cute little instrument, very suitable for beginners and children. Add a lot of fun to your life on every unique occasion. Material: This mini thumb piano is made of Crystal, with surface, outstanding hand feeling, environmental protection, safety and durability. Size: The size of this mini thumb piano is 2.76inch*2.17inch*1.18inch/:7cm*5.5cm*3cm, manual measurement will have a little error, the actual product shall prevail. Advantage: This mini thumb piano just needs to press the metal key and release it to let the vibration resonate in the wooden piano body, you can get wonderful , relieve your work or study pressure, and let you spend a pleasant day. Package Includes: You will receive a mini thumb piano, which is small and cute in appearance and is a great portable musical instrument.