X-Small - 6 in. - 6.5 in. Small - 6.5 in. - 7.5 in. Medium - 7.5 in. - 8 in. Large - 8 in. - 8.5 in. X-Large - 8.5 in. - 9 in. XX-Large - 9 in. - 9.5 in. XXX-Large - 10 in. - 10.5 in.