The Kun Junior Collapsible fits 3/4 and 1/2 violins, and it's unique design allows feet to collapse down onto rest for easy storage. Otherwise this design is nearly identicaly to the Kun Original except for the underside material being brown in color instead of black. Very handy for those with shaped cases or those with insufficient space to store the standard Kun shoulder rests. To select correct Kun parts - hold the shoulder rest so that the KUN logo is right side up. The right parts are on the right, the left parts are on the left.