My dog was identified as a kind of "Pitbull", that's why she has to wear the muzzle in public in the UK. I should try 8 muzzles, but no one was suitable for her. Then I found "Fordogtrainers". I've finally felt that I would get the right variant for my dog by making many measurements and choosing among various muzzle styles. Now she has wire dog muzzle, which fits her perfectly and gives freedom to breathe, drink and eat treats. We are very pleased.