I just bought a 2010 prius from a used car dealer. These were in the trunk. Not sure what it is.. Does it go to the car, or just somebody's junk that they left there?
Hard to tell how big they are because there is nothing to compare them to like a ruler or a dollar bill, etc, for scale. It doesn't look like anything that came originally with the car from the factory. It looks like some kind of clamp. Possibly from a roof rack or something. SCH-I535
I just bought one, too. A glossy black 2012 Prius Two from a dealer, certified used, great warranty, etc. Mine doesn't have those clamps, fwiw. Congrats on the purchase though. I'm pretty excited about these vehicles! I am wondering about ice and snow though, so I'll want the right setup.