Started off with 100cm for each string and ended up running out of maroon and light blue. I would recommend about 130 cm for the light blue and maroon. Also, I had about 45cm left over on the yellow and white strings. Maybe use about 65-70cm for those if you dont like wasting string. I had about the normal amount of string left over for the dark blue, about 25 centimeters so I believe that if I continued until the length I wanted, I would’ve had the perfect amount with some left over still. So 100 cm was perfect for the dark blue string. Hope this helps