The martingale collars provide more control over the dogs without the choking effect of a slip collar.
When the dog is not pulling against the leash, the collar will be comfortably loose.
Size
S:Width 2.5cm, Neck 30cm-50cm.
M:Width 2.5cm, Neck 40cm-60cm.
L-XL:Width 2.5cm, Neck 50cm-75cm.