Size 4 Dogmatic Head Collar
Never used brought 2 sizes and forgot to send back
Size around Nose -13-15"
Neck-19-24.5" this part is adjustable
How you measure your dog-It should fit snugly around your dog's face and behind the ears. You should fasten the buckle up behind the ears, so as to get maximum two fingers underneath. The Dogmatic should not move about the face or ride up at all once the lead is attached under the dogs chin.
It does not tighten like cheap halti's. The dog can open its mouth,eat,drink,carry things still. They do work amazing I use one. Texts please no calls