Size:
Standard sizing (where the holes are located on the collar):
S: 11" - 13.5" (3/4" Wide collar)
M: 14.5" - 17.5" (1" Wide collar)
L: 18" - 21" (1.5" Wide collar)
XL: 22" - 25" (1.75" Wide collar)
XXL: 26" - 29" (2" Wide collar) -THIS COLLAR IS FOR X-LARGE DOGS - Examples Would Be Great Danes, Mastiffs, Leonberger, and Rottweilers