Contains:Moisture proof frosted bagPiano keyboard stickersCleaning clothStickInstructionsinsDescription: Size:White keys (15mm x 20mm/0.6" x 1.57"), Black keys (7mm*25mm/0.27*0.98)BIGGER LETTER DESIGN: The letters on the piano stickers are 20% bigger than regular ones.They can be seen more clearly by kids.THINNER MATERIAL: The piano stickers are 50% thinner than regular ones. You nearly can not feel the existence of them,when you play the piano. And the surface of the sticker is smooth,there is no resistance,when you practice the skills of glissando and arpeggio and so on.PRINTING TECHNOLOGY: The piano stickers are printed underneath the top layer to prevent ink from fading, so they are always clear to read.And you can wipe them with our cleaning cloth when it gets dirty.INSTALL AND UNINSTALL: The piano stickers works for 88/61/54/49/37 keys. The instructions could help you install them within minutes. And paste them on the keyboard by the stick. If you paste them in the wrong place,you can uncover it and re-paste it. It can be removed with no residue left behind,when you do not need it in the future.SUITABLE CROWD: Our piano stickers is a good teaching tool for piano teachers. Also a grateful tool for kids and beginners,etc.