I'm 6ft and 13 stone. 34 inch waist.
Maybe try vaseline?
Joking apart... not that much bigger / heavier than me by the look of it. I do find them a "snug fit" ... as they say. But once in, quiet comfortable.
Though I think Ford are mad making then as neat as they are. As I can imagine a fair few folks might well struggle to get comfortable, or even fit in them