SIZE	Neck girth	Chest girth	Body length	Weight
XXS	18cm ( 7 inch )	21cm ( 8.5 inch )	12cm ( 5 inch )	1-2 lbs
XS	21cm ( 8.5 inch )	26cm ( 10.5 inch )	15cm ( 6 inch )	3-5 lbs
S	25cm ( 10 inch )	32cm ( 12.5 inch )	18cm ( 7 inch )	6-8 lbs
M	30cm ( 12 inch )	38cm ( 15 inch )	21cm ( 8.5 inch )	9-12 lbs
L	34cm ( 13.5 inch )	44cm ( 17.5 inch )	24cm ( 9.5 inch )	13-16 lbs
XL	39cm ( 15.5 inch )	47cm ( 18.5 inch )	27cm ( 10.5 inch )	17-22 lbs
XXL	44cm ( 17.5 inch )	54cm ( 21.5 inch )	30cm ( 12 inch )	23-45 lbs