Monoprice 609015 Violin Shoulder Rest - Size 4/4 Adjustable Designed to fit 4/4 and 3/4 size violins Features synthetic rubber-covered feet, which ensures that it will not mar the finish of your violin. The bar features a wood grain finish, so it will blend in with the look of your instrument. It is adjustable from about 6.2" to about 7.5" wide and features a 3/16" thick dense foam padding, which ensures long term comfort.