I would measure myself, but the car is in the shop . Thinking of getting a new phone, and I am not 100% sure what would actually fit and lie flat. Sort of thinking of a Samsung Note 8 or 9 at the moment, but right now it is just rough ideas. I tend to go with reconditioned phones that are a couple of years old so I can get them at a reasonable price.
Never mind - I found an old thread where this is discussed. https://www.insideevsforum.com/community/index.php?threads/qi-wireless-charging-phone-compatibility.5606/