The name of this sneaker shop will require some aural squinting for some members of the Dutch audience. “Everybody fits sneakers” is trying to say that everybody can wear sneakers because there are sneakers for everybody. If you squint (or wince, like I first did), you’ll see that it’s inventive Dunglish. Els, the Dutch person who found it, wrote “who comes up with such a thing?”. My answer would be way too many people.