XL - Fits Dogs Neck Size 24" to 28" - Waist Size 28" to 46"
L - Fits Dogs Neck Size 20" to 24" - Fits Dogs Waist Size 26" to 32"
M - Fits Dogs Neck Size 16" to 20" - Fits Dogs Waist Size 24" to 28"
S - Fits Dogs Neck Size 12" to 16" - Fits Dogs Waist Size 18" to 22"
