1. Measure the circumference with the knee bent at 90 degrees, below the patella, as shown. Take two extra laps 15 cm above the top edge of the patella and 10 cm below the bottom edge of the patella:

• at a circumference of up to 40 cm at 15 cm above the upper edge of the patella and at a circumference of up to 27 cm at 10 cm below the lower edge of the patella -1
• at a circumference of up to 45 cm at 15 cm above the upper edge of the patella and at a circumference of up to 37 cm at 10 cm below the lower edge of the patella -2
• for a circumference of up to 50 cm at 15 cm above the upper edge of the patella and for a circumference of up to 40 cm at 10 cm below the lower edge of the patella -3
• at a circumference of up to 55 cm at 15 cm above the upper edge of the patella and at a circumference of up to 40 cm at 10 cm below the lower edge of the patella -4