The Jeppesen books are rather massive, but certainly there's no reason you can't use that for private flying - you just may well have lost your medical at the age of 90 before you've filled more than a quarter of it up.
In general, professional logbooks are much bigger. Comparing the two on my desk, my Airtour professional book (pretty much the same as CAP 407) is twice the page size and half again as thick as the increasingly scruffy Pooleys PPL logbook book which actually goes with me and gets filled in at the airfield before being copied up (just the way I work).
At PPL flying rates, I'd guesstimate that a professional logbook will probably fill at about 2000hrs, and a PPL logbook at about 500.
G