Scaled to fit 4/4 size violin with a playing length of 13 inches (328mm), Helicore Octave violin strings are designed to be played one octave below traditional violin tuning, which allows for new tonal and stylistic possibilities. These strings utilize the same core technologies as the Helicore violin strings. This string set is considerably thicker than traditional violin strings, and as a result, they require extra care to ensure proper installation.