We got the missus an 11" ipad pro a few months ago. Heads up, there are almost no keyboard/cover combos in this size other than the massively expensive one via Apple. Still waiting on Logitech as none of the other brands seem familiar and I am suspicious of positive Amazon ratings on those.
The 12.9" ipad seems massive. The way they are displayed in the store, they put them all close to each other so the 11" looks small…until you take it home. I closed all the 12.9" ones so she could just hold the 11 and realize it was already bigger than the old one she was used to and she was happier with that choice, more bang for the buck.