Figure 1. Subjects' legs were marked at the joint line and at 5.08 cm (2 in), 10.16 cm (4 in), 15.24 cm (6 in), and 20.32 cm (8 in) below the joint line.

This girth measurement is at 15.24 cm (6 in) below the joint line. Marks were made with permanent marker so they would not wash off between days