Before anything, i like to make it clear that i don't have access to PTS..
I have been searching through forum, and i find this two version of the map.
First the Big Summerset map, which make summerset look bigger then Auridon

Now there is the actual scale from the world map..

Which one is more accurate you might ask? i also ponder upon such question.. until i find this video.. Hopefully this make things clear for everyone
https://youtu.be/xN-PIKjXet0
P.s. if anyone find the information in this video is inaccurate, please do let me know.. ty