Daprofe Learn To Play Piano And Read Music Fast Decals Key Note Stickers Printed on high quality German Made Oracal removable vinyl and laminated withstand hard playing and perspiration ink will never wear off Fits full size keyboards 36 stickers to cover the white keys for 61 note keyboards Dots measure approximatly .5 inch across in size Keymaps are also great to work out songwriting ideas, progressions and complicated chord relationships. There is an installation video on youtube you can access it through the daprofe website installation video link or by searching Daprofe piano keyboard sticker installation and information video on youtube