Easy to Read: The piano letters are large enough, clear, and easy to read, kids feel joyful to learn the piano and memorize note positions. Compatible:Piano Keyboard Stickers are Suitable for all pianos and keyboards: color big white keys and black keys big keys stickers 88/61/54/49 keys,With black and white keys Easy to Clean: The sticker is transparent and thin, easy to paste. Perfect Gifts: Keyboard Letters Notes Label is a good gift for children or friends who are learning piano. Application: It is suitable for beginners of electronic piano, hand rolled piano and electric piano, and is a good partner for learning electronic piano.Learn electronic piano and piano faster, recognize piano keys, become familiar with and memorize piano scores to speed up learning rhythm. Size Chart: 21cmx15cm/8.27inchx5.91inch Package Includes: 1Piano Keyboard Stickers Note: Please allow slightly errors due to manual measurement and different monitors.