Description [Material upper material]: Highquality PVC material music keyboard stickers can be reused, leaving no glue, will not damage your keyboard. [Size]: The size of the white key and black key sticker is 15.5*40mm and 8.5*39mm. [Bright design]: Each note is colorcoded and printed with musical letters, upanddown staff and pitch, which can help you and your children quickly recognize and remember the different melodies of the keyboard piano. [Easy to install]: Just take out the piano keyboard sticker and tap on the electronic keyboard or piano keyboard. [Application]: Piano key stickers are suitable for most pianos and electronic keyboards; a good assistant for learning piano and practicing children or beginners. The package contains 88 stickers, enough for any keyboard or piano with white and black keys (49/61/54/88 keyboard).