How large would Earth be in PA

I always thought that the scale were in Kilometers, which would make much more sense, specially with the planet distance to the sun
Earth's radius is ~~ 6400 km, and the distance to the sun is ~~150 000 km
then, a size 6400 should make it
on the other hand, the game sun's size is 4000, which means we need bigger suns (and other colors as well)