?Specification / Size:
S sharp-tongued adjustment range 19 ~ 23cm mouth adjustment range 22 ~ 26cm around the back of the head twice mouth adjustment range 29 ~ 36cm
M sharp-tongued adjustment range 22 ~ 26cm mouth adjustment range 26 ~ 31cm around the back of the head twice mouth adjustment range 29 ~ 36cm
L sharp-tongued adjustment range 25 ~ 31cm mouth adjustment range 30 ~ 33cm around the back of the head twice mouth adjustment range 39 ~ 46cm
XL sharp-tongued adjustment range 31 ~ 35cm mouth adjustment range 36 ~ 42cm around the back of the head twice mouth adjustment range of 46.5 ~ 54cm