UNIVERSAL PIANO STICKERS - Our piano key stickers fit most pianos and electronic keyboards. Suitable for a full set of 32/37/49/54/61/88 key pianos. EYE-CATCHING DESIGN - Each note is color-coded and printed with the musical alphabet, staff notation, and ascending-descending tones, helping you and your children quickly identify and memorize the different notes on the piano keyboard, making learning and practice easier. REUSABLE - Music key stickers made of high-quality PVC material, can be reused without leaving any glue residue and will not damage your keyboard. EASY TO INSTALL - The 2 guides in the upper right corner and lower right corner can help you install them in minutes. Piano key stickers are 50% thinner than regular ones. You can hardly feel their existence. WIDE APPLICATION - Piano key stickers fit most pianos and electronic keyboards; Great assistant for piano learning and practice by children or beginners.