I like a #4 and white usually does the job on the water I fish mostly. I don't tie commercially but here's the pattern.
Mustad 3366 #4
Cork popper body (reversed, painted, and epoxy coated)
Tail: calf tail & two strands med. round rubber.
Hackle: grizzly saddle
The deer hair version doesn't cast as good, doesn't have that sexy "splat", gets waterlogged, and just doesn't get bit like this one, so I don't even carry or tie them anymore. But of course YMMV