[ DESIGN]The letters and on the piano stickers are increased by 20%,and the font has been bolded,to easier and beginners to recognize. Small letters are easier for children to see when they play the piano, which can accelerate their memorization of the keyboard. [THINNER MATERIAL]The piano key stickers are 50% thinner than regular ones. You nearly can not feel the existence of . The surface of the sticker is smoother to practice the skills of glissando,arpeggio and so on. [PRINTING TECHNOLOGY]The colorful piano note stickers are printed underneath the top layer to prevent ink from fading ,keeping always clear to read. You can wipe with cleaning cloth when it gets dirty. [INSTALL AND UNINSTALL]It works for 88/61/54/49/37 key. The instructions could help you install within minutes. Paste on the keyboard by the stick. 't worry if you paste in the wrong place,it's easy to uncover and re-paste. It can be removed with no residue left when you may 't need it. [SUITABLE CROWD] piano stickers help give a better teaching,or to be an assistant tool and beginners.There are installation videos and music score on website in the instructions,which may give you good exemples. Colour:Multicolor Material:Transparent PVC Size:260x2x255mm Package Contents: 1* Piano Sticker Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.