The vibrating string length for each size of violin 

• 4/4 size: approximately 325mm-330mm

• 3/4 size: approximately 295mm-305mm

• 1/2 size: approximately 265mm-270mm

• 1/4 size: approximately 245mm-265mm

• 1/8 size: approximately 195mm-208mm

• 1/16 size: approximately 160mm-180mm

Please note that these measurements are approximate and may vary slightly depending on the specific instrument.