You would want the 4" Birch Bug. A 3.0 hook is going to be just under 2", the body on the 4" Birch Bug is just over 2" (2 1/8). Perfect fit for a 3.0 hook.
A 3" or even 3.5" version would leave you nothing to put your hook in.
We could make one for a 3.0 hook but it would just be shrinking the claws. Let me know if you are interested in this.
Tight lines!
Jason