Helicore viola string set, short size, - Model: Widdario helicore SM I mistakenly purchased the wrong length and am selling it because it doesn't fit my 15.5-inch viola. The C string bag has been torn, but all strings are unused. The length from the ball end of the C string to the decorative winding of the peg end is about 43.2mm. Please confirm the suitability for your viola.