Micro:

Outer Diameter: 12.0mm

Inner Diameter: 8.0mm
Thickness: 2.0mm
Material: 304 Stainless Steel

Small:

Outer Diameter: 16.0mm
Inner Diameter: 10.0mm
Thickness: 3.0mm
Material: 304 Stainless Steel

Medium:

Outer Diameter: 20.0mm
Inner Diameter: 13.0mm
Thickness: 3.5mm
Material: 304 Stainless Steel

Large:

Outer Diameter: 24.0mm
Inner Diameter: 16.0mm
Metric Wire Gauge: 4.0mm
Material: 304 Stainless Steel

Extra Large:

Outer Diameter: 28.0mm
Inner Diameter: 20.0mm
Metric Wire Gauge: 4.0mm
Material: 304 Stainless Steel

Strong, reliable & high-quality fastening
Easy push-to-open mechanism
Ideal for necklaces, bracelets, chokers, bags & keychains

100% Stainless Steel - Hypoallergenic, water safe, lead & cadmium free