Lupine Crazy Daisy Combo Collar for Medium Dogs is a dual-action collar for walking or training and is the only design for greyhounds and similar dogs that back out of regular collars.
Martingale-style with an additional sewn-in D-ring so it can be used either as a limited-slip choker or as a regular flat collar.
Width: 3/4 inch
There is no buckle, collar has to slip over the widest aspect of the head, so measure around the head and under the jaw as well as around the neck. Add 5% additional length to whichever measurement is larger to find the Combo collar size range needed.
Note: This collar should not be left on an unattended or unleashed dog.