Got this item today and im well happy, We have a male stud dog who is aggresive with my other boxer dogs we have been resorted to keeping him on a lead in the house which has not been great for him. Now i can gladly say this will not have to happen anymore! This muzzel is brilliant! He has had it on for 2 hrs and has clamed down very nicly....Although hes abit grumpy ha ha Thanks to all the team!!!!! A FANTASTIC PRODUCT EXCELLENT SIZING!!