S no. : 28 cm neck circumference， chest circumference， 28 cm - 38 cm
M number: 32 cm neck circumference， chest circumference， 38 cm - 45 cm
L: 37 cm neck circumference， chest circumference 45 cm - 50 cm
XL number: 42 cm neck circumference， chest circumference 50 cm - 56 cm

Note: transfiguration fitted wearing only two front legs Oh， the hat is buckled with rubber band， if the hat is too large， you can make a rubber band Results!