It is notable that the Miocene physeteroid whale Livyatan melvillei is described as having the largest predatory teeth known, with length reaching 36 cm long and 12 cm wide.
Only I've read on the website that isolated teeth from pliosaurs were known from Oxford with sizes reaching 40-45 cm (width not specified).
Unfortunately, I've not seen any picture of these though I'm pretty sure they exist as they are reported by paleontologists.
But wouldn't such teeth normally be considered as the largest predatory teeth known ?
Also, how large are these teeth compared to the teeth in the largest pliosaurs or kronosaurs species known ?
Aren't they somehow still suggesting the possibility of ~20 m pliosaurs individuals ?