The product has been tested for breaking strength in an external laboratory. The size recommendations take into account a safety margin.
The collar size refers to the size to which it can be adjusted. Breed examples are for guidance only, check the correct size by measuring the dog's neck circumference.
XXS (20-26cm):chihuahua, Russian Toy Terrier, Yorkshire Terrier XS (26-32cm):miniature dachshund, bichon frise, miniature pinscher S (28-34cm):dachshund, cocker spaniel, basenji M (34-42cm):springer spaniel, nova scotia retriever, border collie L (42-50cm):golden retriever, rough collie, german shepherd
For more information about materials, their breaking strengths and weights, see "Information about materials"
See instructions for choosing the right size collar here: