this is really good news! I checked yesterday and the beta is about 7GB by me. I wonder how big will be the full game...
It's about 9.5 GB
I think you are mistaken. The BETA is ~9900 MB or 9.6GB. When the full game is released there is going to be an update (I read 2.8 GB), bringing the entire game total to around 13.4GB.