Canny Collar (sizes 1-5) Posted on 13th May 202013th June 2020 by KnightsbayDogTraining by The Canny Company £18.00 Size choices: : Size 1- Neck size 23-28cm (9-11 inches)Size 2 - Neck size 28-33cm (11-13 inches)Size 3 - Neck size 33-38cm (13-15 inches)Size 4 - Neck size 38-43cm (15-17 inches)Size 5 - Neck size 43-48cm (17-19 inches) Simple dog head collar which stops your dog from pulling when on a walk. Why use a Canny Collar?