Is Singapore included in the territory? Because then you would see a sizable Pacific fleet to protect the Gibraltar of the Pacific and the land around it.
About how sizable would you say? I plan on making it a fairly big navy anyways, but a recommended number would be nice if that's the case...
The navy that I've planned (as a whole) for 1935-ish will contain about:
6-12 Super Dreadnought battleships,
2 or 3 Super Dreadnought battlecruisers,
maybe a few renovated dreadnoughts for relatively coastal duties(for example defending Singapore),
between 20 and 35 cruisers of different sizes,
an as of yet undecided number of destroyers and other smaller vessels,
Probably 2 or 3 carriers, though they will take some time for me to make.
A large part of the concept for the WW2-era navy will be that of the treaty-japanese(as far as that goes): A lot of big cruisers and destroyers with a heck of a number in torpedo broadside, supported by a relatively small battlefleet.
I will be working on a pre WW1 navy plan as well.