A cruiser with fifteen 10-inch guns

How large would a World War II heavy cruiser with five triple 10-inch turrets be?

Extremely large; three or four triple 12-inch turrets are judged an easier design choice.

Five triple 10-inch turrets would produce a very large cruiser. The alternative proposed is a heavier calibre in fewer mountings. Three or four triple 12-inch turrets would be easier to arrange than the requested five-turret battery. The answer supplies no displacement estimate.