Set	Size	Head cricumference(A)	Height(B)	Ear width(C)	Rough standard weight
Small & Medium Dog Size	S	30cm (11 13/16″)	11.9cm (4 11/16″)	4.7cm (1 7/8″)	1.5〜6kg (3.3~13.2lb)
	M	35cm (13 3/4″)	13.9cm (5 1/2″)	5.5cm (2 3/16″)	6〜12kg (13.2~26.5lb)