Fits full-sized 4/4 instruments. Nice Item For Students and Beginners Stick these on your violin fingerboard to help find the notes and proper intonation. Easy on and easy off. The sticker covers a full octave. The notes on the large end of the sticker (G D A E) are an octave above what your open strings are tuned to (as noted in white letters at the small end). Specifications: Size: Approx. 18*5cm/ 7.09*1.97inch Material: Paper + Stickers To Install: 1. Loosen the strings enough to push them aside . Be careful not to move your bridge in the process. Be sure to check bridge placement when you are finished. 2. Carefully peel the backing off the label. 3. Apply the label by carefully making sure it is in position before sticking it down. Slide the small end snug against the nut. If it sticks on you before you get the proper placement just peel up carefully and start again. 4. Re-tune your strings and you are ready to go. 5. To remove labels just peel off slowly and carefully. If any residue remains on your fingerboard you can easily remove it with a little rubbing alcohol or soapy water dabbed on a piece of tissue paper. These are temporary only. Most students only need to use them for a few weeks until they get used to the fingering positions. Please Note: It is manual measurement, there may be 2-3cm error. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.hope understanding.