Falconry & Raptor Calculator

Professional equipment fitting, fitness metrics, and hood sizers.

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Equipment & Leg Fitting

Raptor Tarsus/Leg Diameter5.4 mm
1.5 mm (Kestrel size)10.0 mm (Eagle size)
Anklet Construction Style

Rolled edges prevent direct chafing on the raptor’s leg but require highly precise leather cutting.

Anklet & Jess Dimensions

Recommended Grommet SizeSize 1 (5/16" / 7.9mm)Inner fitting diameter
Leather Anklet Width16 mmAnklet length: 21 mm

Jess & Leash Ratios

Mews Jesses Length6 inches
Hunting/Field Jesses5 inches (slitless)
Braided Leash Scale32 inches (braided)
Leather Thickness1.6mm (Kangaroo/Calf)

Ensure jesses are never too tight to pinch, nor too loose that a claw could slip into the anklet loop. Check equipment daily for leather dryness or micro-fractures.

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