I don't have one to try but I'd say it could be a bit tight for the big "phablet" phones such as the iPhone Max etc. I have a standard sized iPhone 11 and I think that "just fits".
Note that the wireless charging barely gives you a trickle of current, it'll maintain current charge level at a push and thats about it. It also tends to make the phone very hot! So all in all, its not that useful tbh.