My cousin has an I4 and it looks really small on him. He also feels as if the mask is too tight (even after fully loosening it)
My brother has one and it looks small on him too. Same problem with feeling too tight here.
I have one and it is small on me. The mask goes down past my mouth and stops just above the chin.
That being said~! We all love our I4's still. For me at least, it is extremely comfortable. I have the black/gold with gold reflective lense. It's really easy to breathe in as well. I'm a smoker and am never short on breathe with these on.
If you are not worried about an exposed neck and possibly lower chin, get these and you won't regret it.