Dear Maryta,
Thank you for your reply. I will send a photo as soon as my dog gets used to the muzzle, I am still working on it. At least I see that this dog muzzle is comfortable, but not hard and tough like most of dog muzzles I've seen.
Also the dog breed I have not the one usual for wearing a muzzle for aggression. My dog needs it because he is ball-addict. When he sees a ball rolling it makes him crazy and very loud. This becomes more tough the last years. Thus, if I want to let him out alone, he has to be muzzled. I will send you a photo in the nearest future.