S (32–39 cm / 12.5–15 in)Variant sold out or unavailable M (40–47 cm / 15.5–18.5 in)Variant sold out or unavailable L (48–55 cm / 19–21.5 in)Variant sold out or unavailable XL (56–60 cm / 22–23.5 in)Variant sold out or unavailable 2XL (61–66 cm / 24–26 in)Variant sold out or unavailable 3XL (67–73 cm / 26.5–28.5 in)Variant sold out or unavailable 4XL (74–82 cm / 29–32 in)Variant sold out or unavailable