In a spectacular mix-up by a family with four different iPhones, we have 2 ZAGG Invisible Shields: hdx [HD Extreme Impact Screen Protection] for iPhone 8/7/6s/6 that don't fit our phones. 

We opened the box, pulled out the shield, realized it didn't fit, put it back in box. All parts are included (see picture).

These are cheap insurance for your iPhone...ESPECIALLY when you get the right one.