The size I used was 1/0, and I found this size to be perfect for a sardine. The wire gauge was slightly heavier than I was used to, and there was a bit of an inward bend on the very tip of the hook.
None the less I flew these hooks out in nose hooked, shoulder hooked, and butt-hooked baits—time and again, the hook connected when my bait was picked up. I will keep a package of these on me whenever I am on the water from here on out. -AE