English Mastiff is terms of sheer mass is the biggest of them all and its size is something to be believed. This dog is pure power - if any superhero needed a dog then this may well be their first choice. The English Mastiff can weigh up to a whopping two hundred and fifty pounds.
That is quite a weight when he says hello to you in the morning by jumping on to your chest (of course, well trained they are probably more thoughtful than that!). As well as being the biggest dog in the world it is also recongnized as the oldedst dog breed in the United Kingdom (proabably - there is a debate but we go with this guy. Well - are you going to argue?).
What are the other ten? Click HERE or on the picture above to find out.
Image Credit Flickr User Claudiogennari