There are several guides in southern California who fly fish of mako and blue sharks. When I went last year, we used flies tied on Trey Combs 8/0 and 10/0 hooks. The flies were 8 to 10 inches long and we fished with 12 to 16wt rods.
You don't see many descriptions of shark specific flies for Southern CA shark fishing because these are flies are generally pretty generic since the sharks are not picky They typically resemble bait fish 8 to 10 inches long and are bright colors such as red, yellow, and orange. Synthetic fibers are often used since they do not soak up water and so are easier to cast, though casts are rarely more than 30 feet. Some tiers use saddle hackle. Many anglers use tube flies. Sharks are hard on hooks and flies, and a tube fly setup allows you to replace hooks or flies as needed.
If you google "fly fishing mako sharks" you will find lots of images with sharks and the flies typically used.
This link shows one example of a style of fly used
www.umpqua.com/p-120-sharkcuda-fly.aspx
For another example, look at Trimble Shark Flies in the saltwater flies section of the Bass Pro website