They’re 8, 10, or 12 mm. The fender rail bolts (pop the hood and look) or the ones between the door opening when the door is open, and radiator fan bolts are 10mm. If they’re the same size they’re 10mm.
If they’re smaller they’re 8mm.
if they’re bigger they are 12.
Ive got a charcoal gray 2014 parts car but it’s at my office not home so I can’t look. PM me if you want to buy a mirror.