We took iPhone 6S Plus as a benchmark. You can see how it looks.
Even though the phone is slightly longer than the cradle, the glass catches the whole screen. We wouldn't recommend anything larger, since we have little confidence in the performance — as the area caught in the reflection varies a lot depending on the angle between the glass and the cradle.
In short, we can say that if your phone length and width are within 158 x 77 mm (6.2 x 3.1 inches) it fits HUDWAY Glass.