I wouldn't call those jeans skinny on him, they're nowhere near tight. He's got skinny legs though. That's an ideal jeans fit IMHO. Go tighter and they're skinny, go slightly bigger and they're dad fit, go even bigger and they're baggy.
FWIW, I like the different components (except the hat), but I just don't think they jam that well together. Once again though, props to him for doing him.