Simply place the feather around the head nail in the middle so that the fibers of the feather stand up. With the help of the scale you can see directly for which hook size the taught feather is best suited, and that before you tear it out of the saddle.
WellieSTR Hook & Hackle Gauge for Fly Tying Size Tool Hook Feather & Bead Size Measure Tool for Vises Fishing Accessories : Sports & Outdoors
Fly Tying Whiting Farms Hackle Gauge - Blue
How To Measure Hackle - Flylords Mag
Whiting W-100 Hackle Gauge - webstore
How To Measure Hackle - Flylords Mag
Whiting Hackle Gauge –
How To Measure Hackle - Flylords Mag
Whiting W-100 Hackle Gauge - webstore
Whiting Hackle Gauge - ( WHITING FARMS, INC)
The Whiting Hackle Gauge gives the tier an all new method of measuring hackle for dry fly tying. Taking into account the gape measurements of today’s
Whiting Hackle Gauge
Hareline Hackle, Hook and Bead Gauge - BWCflies Australia