Small
- Top Circumference: 38–42cm (15–16.5in)
- Bottom Circumference: 30–35cm (12–14in)
Medium
- Top Circumference: 42–46cm (16.5–18in)
- Bottom Circumference: 35–40cm (14–16in)
Large
- Top Circumference: 46–50cm (18–19.5in)
- Bottom Circumference: 40–45cm (16–18in)
Extra Large
- Top Circumference: 50–54cm (19.5–21in)
- Bottom Circumference: 45–50cm (18–19.5in)