This is the one I used last night...
It's most likely the 34cm paella. Which is certainly not too small for feeding 2 people. As a matter of fact, we'll have the leftovers steam re-heated, for lunch.
I've also used two larger sizes to make paella for gusts, with no problems. Either by attending the pan and/or by using it over 2 burners. It's called understanding your stove and pans.