[LARGE LETTER DESIGN]The letters and staff on the piano stickers are increased by 20%,and the font has been bolded,to easier for kids 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 . You nearly can not feel the existence of them. The 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 them always clear to read. You can wipe them with our cleaning cloth when it gets dirty. [INSTALL AND UNINSTALL]It works for 88/61/54/49/37 key. The instructions could help you install them within minutes. Paste them on the keyboard by the stick. Don't worry if you paste them in the wrong place,it's easy to uncover and re-paste. It can be removed with no left when you may don't need it. [SUITABLE CROWD]Our piano stickers help give a better teaching,or to be an assistant tool for kids and beginners.There are installation videos and music score on official website in the instructions,which may give you good exemples. Colour:Multicolor Material:Transparent PVC Size:260x2x255mm Package Contents: 2 x Piano Sticker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.