The sisal is selected according to the length, color and degree of impurities. In order to select by length, the sisal is separated in the following categories:
Long (L): fiber length from 0.90 metes to 1.10 meters;
Medium (M): fiber length from 0.70 meters to 0.90 meters;
Short (S): fiber length from 0.60 meters to 0.70 meters.
Below, you can see how the sisal fiber is categorized by its degree of impurities.