Pet Tops	NECK	LENGTH	WEIGHT
S	9.5"	10"	8 - 10 lbs
M	9.75"	12"	11 - 25 lbs
L	16.75"	15.5"	26 - 40 lbs
XL	19"	17.5"	41 - 60 lbs
XXl	23"	20"	61 - 80 lbs
These are extra tight shirts for extra sexy dogs so if your dog is NOT sexy order a size up!