I can tell you they look plenty big to me and if hinged properly can give huge throws.
This model is, for some, reason very pitch sensitive, so it's unlikely you will need even moderately large elevator throws. In fact, I would recommend your first flights should be rated down to about 60% so you can get used to the elevator!
Anything above what looks like very small elevator movement, and you have to keep a look out for snapping, although the loop radius is pretty small before you get to that stage!
Enjoy!
-David C.