1WIDELY USED: Removable piano keyboard letters fit all 88 61 54 49 key pianos in the right size, perfect piano stickers for beginners to aid in home practice, training and teaching. 2EASY TO SET UP: Piano keyboard stickers are easy to install, each piano key label is uniquely coded, depending on the type of piano you have, choose the stickers that start the numbering process and stick them in order from left to right. 3REMOVABLE: Piano key stickers are made of PVC, you can remove them and adjust them into place when the posting is not in the correct position, when you don't need the keyboard piano stickers, you can easily remove them without leaving any trace. 4COMFORTABLE TO TOUCH: The piano key stickers are so thin that you can barely feel them when playing the piano. The surface of the stickers is slippy and non resistant, so you feel comfortable when practicing slides, arpeggios and other techniques. 5QUICK POSITIONING: Piano keyboard letters adopt 3 in 1 design, tone name, singing name, pentatonic scale fused into one, bold font, bright color, easy to differentiate and identify, help beginners quickly determine the position.