Corvette window shade
I have bought several for all of my cars (I have 5 cars) and they have all been a perfect fit and lower the internal passenger compartment temperature by at least 20 degrees and protect the dash and steering wheel perfectly and my leather seats don't burn my legs when I get in.
C-7 Corvette sunshade
The Covercraft Sunshade for the C-7 Corvette fits the lower window and sides well, but it does not "snug in" to the upper window area...and then falls backward towards the seats. This leaves a gap. Plus, the sunvisors on the Corvettes don't swing forward enough to keep the shade supported. I ended up bending my sunshade to help keep it forward...but that leaves a definitive crease. I supposes you could shim it somehow to reduce the gap.