Measure your dry fly hackle to assure the right proportion. The Griffin Hook and Hackle Gauge is a great selling.and must have fly tying tool.
Griffin Hook & Hackle Gauge
Perfect Hatch Hook & Hackle Gauge
Whiting - W-100 Hackle Gauge — Golden Fly Shop
Hareline Hackle, Hook and Bead Gauge Anodized Red #310 - Hareline Dubbin
Griffin Hook & Hackle Gauge - Troutlore Flytying Store
Hook/Hackle Gauge
Griffin Hook & Hackle Gauge - Troutlore Flytying Store
Griffin Hook & Hackle Gauge
Hackle gauge— two types : r/flytying
Perfect Hatch Hook & Hackle Gauge
Walbest Wooden Fly Tying Hackle Measuring Gauge Tool Fishing Tackle Accessories
Hackle, Hook and Bead Gauge Anodized, Hareline