【Large LETTER DESIGN】The letters and staff on the piano stickers are increased by 20%. The font has also been bolded. In order to make it easier for kids and beginners to recognize. It solves the problem that small letters are hard to find in playing. | 【THINNER MATERIAL】The piano key stickers are 50% thinner than regular ones. You nearly can not feel the existence of them. The surface of the sticker is smooth,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,so they are 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. 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. It's a grateful tool for kids and beginners.There are installation videos,Music Score,playing examples on official website in the instructions.