Features: Stickers work for pianos & keyboards with 37/ 49/ 61/ 88 Keys, applied to the white & black keys. PVC material, printed with musical alphabet and black key's pitch, which will make your piano learning and practice easier. Thinner and smoother design, you nearly can not feel the existence of them when you play the piano. Backside with adhesive material, easy to adhere to your keyboard, and they can be removed with no residue left behind, when you don't need them any more. Including instruction stickers to help you stick them within minutes. A great assistant tool for piano teachers and beginners. Specifications: Color: Black Letters(T-30Z)/ Colorful Letters(T-30ZM) for option Material: PVC Size of Sticker for White Keys: 1.5 * 2.5cm / 0.6 * 1in Size of Sticker for Black Keys: 0.7 * 2.5cm/ 0.3 * 1in Package List: 1 * Piano Sticker