The Frenchie is commonly tied on a jig hook, and usually fished by euro nymphing style. However the same fly can be tied on a traditional nymph hook and is also quite effective fished under an indicator as well. In fact, I had some great luck with this fly on my last trip to the Animas.
I tie these small for my local rivers, but you can tie them much larger if you want.
The materials I used...
Hook: TMC 3761 on size 16
Thread: Veevus 10/0 in Red
Bead: 2.8mm Gold Tungsten Bead
Weight: .010 lead wire
Tail/body: Pheasant Tail Fibers
Ribbing: UTC Small Gold Wire
Collar: UV Shrimp Pink Ice Dub
Glue: Hard as Hull Head Cement