Size | Sharp-tongued circumference | Middle mouth circumference | Back of the head circumference | Weight |
S | 14-18/cm | 18-22/cm | 21-33/cm | 4-12.5/kg |
M | 19-22/cm | 23-27/cm | 24-36/cm | 10-25/kg |
L | 23-26/cm | 29-33/cm | 31-40/cm | 22.5-37.5/kg |
XL | 24-28/cm | 30-35/cm | 38-49/cm | 35-55/kg |