Collars

Mirage Pets sizing system (unless otherwise noted on the product page):
Size 8 will fit a pet's neck from 4"-6" Size 10 will fit a neck size from 6"-8" Size 12 fits necks from 8"-10" And so on. The easiest thing to do is to measure your pet's neck and add two inches to come to the right size. The only exception is the large leather collars, for these collars measure the dogs neck and add 4". When in doubt, buy the larger size.

Shirts:
SizeNeckLengthGirth
XS8"8"11"
SM9"10"13"
MD10"12"16"
LG12"14"18"
XL13"16"20"
2XL14"18"22"
3XL18"20"24"

Hoodies:
SizeNeckLengthGirth
XS8"8"15"
SM11"10"16"
MD12"12"18"
LG13"14"20"
XL15"16"21"
2XL16"18"23"
3XL18"20"27"

Dresses:
SizeNeckLengthGirth
XS8"8"11"
SM9"10"13"
MD10"12"16"
LG12"14"18"
XL13"16"20"
2XL14"18"22"
3XL18"20"24"

Jerseys:
SizeNeckLengthGirth
XS6" - 8 1/2"6" - 9"15" - 18"
SM8" - 10"8" - 12"18" - 21"
MD10" - 12 1/2"14" - 18"21" - 24"
LG12" - 15"20" - 24"23" - 26"
XL15" - 20"24" - 28"26" - 34"

Cheerleading Outfit:
SizeNeckLengthGirth
XS6" - 8 1/2"6" - 9"15" - 18"
SM8" - 10"8" - 12"18" - 21"
MD10" - 12 1/2"14" - 18"21" - 24"