Supposedly, these nanoSIM trays are for the iPhone 5S. They look exactly like nanoSIM trays for the iPhone 5, except for one thing: they are in gold and gray. This is notable because in the iPhone 5 the nanoSIM trays were silver and black, and the iPhone 5S is rumored to come in different colors.
Except… gold seems like a pretty gaudy color to release a new iPhone in, don’t you think? And gray is sort of an anti-color, not the kind of thing you get excited about buying a new iPhone for. “Check out my cool gray iPhone!”