The Tree of Life with Hummingbird fretboard inlay decal sticker is sized to fit nicely between the frets of a standard 23&" concert ukulele. (If you have a custom uke you may need to make minor adjustments as you apply the decals.) Easily add an extra dimension to your concert ukulele with decorative, inlay-look decals. Inlay decals are made from PET, and are only 0.07mm (or 0.00276 inches) thick. - When applied following the manufacturer’s directions, these super-thin inlay decals will not become caught under your fingers while playing. - They do not affect string action or sound.  - No adhesive is left behind if you choose to remove the decal.  - Common ukulele/guitar cleaners and conditioning oils will not affect the decal.  For best adhesion it is a good idea to wait several weeks after using a cleaning/oil product before applying your decal.