The one here in the Prius Chat shop is a perfect fit. Sunshade HeatShield for 2016-2018 Toyota Prius - Front - PriusChat Shop I've bought stuff from the store with good results. There was a time when it was not working so well, but I think that's fixed now. Another option is right from the manufacturer, but it's a little more expensive. Windshield Sun Shades, Car Window Shades and Car Window Covers by HeatShield: The Original Windshield Sun Shade
