I have tried it on the doors of small size SUV and a small size sedan. The sleeve I shaped to the car door shape, sloping on one side, taller on the other. It fit on the rear door of both cars. It was too small for the front door of wither car. However, even though the shade is not larger enough to fit over the front door that actually works out fine because it leave the side mirror uncovered and it does not obscure the mirror from the driver's view.
This sunshade is made out thin nylong fabric. The sun shade does not totally block out the sun, it dims it. In attached video I show a few comparison with and without the sun shade so you can see the difference. It does obscure the view through the window, you can see things but not clearly.
If you are using it for a baby in the back seat it works better as you don't need to worry about exposing the side mirror, shaded view out of the window.
The shade size is 20.5" x 31"
You can find it on Amazon by following this link.
Ali Julia review ★★★★