1. Measure the knee circumference as shown.
Take two extra laps 13 cm above the top edge of the lid and 13 cm below the bottom edge of the patella:
• for a circumference of up to 46 cm at 13 cm above the upper edge of the patella and for a circumference of up to 42 cm at 13 cm below the lower edge of the patella is S
• for a circumference of up to 50 cm at 13 cm above the upper edge of the patella and for a circumference of up to 46 cm at 13 cm below the lower edge of the patella is M
• for a circumference of up to 56 cm at 13 cm above the upper edge of the patella and for a circumference of up to 52 cm at 13 cm below the lower edge of the patella is L
• for a circumference of up to 59 cm at 13 cm above the upper edge of the patella and for a circumference of up to 55 cm at 13 cm below the lower edge of the patella is XL
• for a circumference of up to 63 cm at 13 cm above the upper edge of the patella and for a circumference of up to 59 cm at 13 cm below the lower edge of the patella is XXL