Please NOTE - The measurement is the length of the hook or hoop 

Measurements are approximate, Below are for the hooks and hoops sizes in millimetres.

20mm Hoop

Gauge / Wire Diameter - 1.9mm

Internal Hook Diameter - 5.2mm

Shaft Length - 10.6mm

Thread Length - 6.3mm

Total Length - 20mm

25mm Hoop

Gauge / Wire Diameter - 2.3mm

Internal Hook Diameter - 7.4mm

Shaft Length - 14mm

Thread Length - 10.4mm

Total Length - 25mm

30mm Hoop

Gauge / Wire Diameter - 2.8mm

Internal Hook Diameter - 8.2mm

Shaft Length - 16.8mm

Thread Length - 11.8mm

Total Length - 30mm

40mm Hoop

Gauge / Wire Diameter - 3.2mm

Internal Hook Diameter - 10.2mm

Shaft Length - 24.9mm

Thread Length - 15.2mm

Total Length - 40mm

55mm Hoop

Gauge / Wire Diameter - 4.6mm

Internal Hook Diameter - 14.2mm

Shaft Length - 32.8mm

Thread Length - 21.7mm

Total Length - 55mm

65mm Hoop

Gauge / Wire Diameter - 5.1mm

Internal Hook Diameter - 16.7mm

Shaft Length - 38.5mm

Thread Length - 27.4mm

Total Length - 65mm

75mm Hoop

Gauge / Wire Diameter - 6.7mm

Internal Hook Diameter - 19mm

Shaft Length - 41.5mm

Thread Length - 29mm

Total Length - 75mm

100mm Hoop

Gauge / Wire Diameter - 7.3mm

Internal Hook Diameter - 19mm

Shaft Length - 65mm

Thread Length - 50.3mm

Total Length - 100mm

150mm Hoop

Gauge / Wire Diameter - 7.4mm

Internal Hook Diameter - 19mm

Shaft Length - 115.2mm

Thread Length - 51.4mm

Total Length - 150mm