Sized to fit long-scale viola (body length 16-16 1/2 inches) with a playing length of 15 inches (380mm) and designed in partnership with Ned Steinberger, D'Addario's NS electric Viola strings are designed to enhance the expressive range of tone for even the most discerning players. These electric viola strings are made specifically for NS-designed electric instruments, but can also be used on acoustic instruments. Sized to fit long-scale viola (body length 16-16 1/2 inches) with a playing length of 15 inches (380mm).