The body on the current one is 2.625". A 3.0 would work, but it is really designed for a 4.0, 5.0 hook, or a tube jig. I think a 2" or 2 1/8" would be perfect for a 3.0 or smaller tube jig. Smaller than 2" you would be putting the hook in the opening vs. through the bait. This will work, but my preference would be through the bait to secure the hook.
Jason