The chaps vary a bit by size but the lower 3 straps fit a maximum of 20 inches (500 mm) in circumference, the second to top fits 24 inches (600 mm), and the top most strap fits 30 inches (750 mm).
The fit at the thigh is the 30-inch circumference measurement and the calf is the 20-inch circumference measurement. These measurements include the straps at maximum extension plus the chap width.
