The right string length reaches about 3 to 4 inches (7.6 to 10 centimeters) above your navel, so cut it there with some scissors.
(The right string length; reaches; about 3 to 4 inches (7.6 to 10 centimeters) above your navel)
The right string length
reaches
about 3 to 4 inches (7.6 to 10 centimeters) above your navel