Page 202 - Derek E. Avery - The new encyclopedia of knots
P. 202
figure 144
figure 145.1
To calculate the length of rope required, multiply the circumference of the
object by the number of bights x 1.5 x the number of times followed
around plus one extra time followed round.
Turk’s head knot: instead of forming the Turk’s head around an object,
this decorative knot has been tightened to form a ball.