Fits 3/4 or 4/4 violins! Selling because I ordered one too many for my student. Is your violin's chin rest uncomfortable for you? This chin rest is ergonomically adjustable and may be a better fit! It has a wider spoon than most chin rests out there, which offers the player more support, allowing the player to relax more which leads to better sound. It also has an adjustable height and angle - unlike anything else on the market! I am a violin teacher specializing in chin and shoulder rest set-up, so I could help you put this on your violin and adjust it to your liking. $46 on Shar Music.