@jeni15 It is 31 cm long so I recommand a base string of at least 36 cm. That way you have a safety margin. If you use Lark's Head knots as a start, you'll need to double that lenght. I'm sorry I took that long to answer you. I hope it'll help you knot that awesome pattern!
@dani6ll9 It did take quite a while to do it. A row took me between 45 min and 1 hour to knot. It took me around 5 months to knot it but I had time to do it! I must say it was quite an adventure and I won't do it again for the time being! 😉