Size	Length (in inches)	Chest (in inches)	Neck (in inches)	Weight
Extra Small	17.5	12-14	9	4-6 lbs.
Small	20	14-17	11	6-8 lbs.
Medium	22.5	17-21	14	10-12 lbs.
Large	30	21-24	17.5	14-18 lbs.
Extra Large	32	24-27	21	20-25 lbs.