DIMENTIONS

Men's Size:
· Inner Diameter: 13.5 cm (5.32')  
· Suitable for neck circumference up to 40 cm (1' 3.75')

Women's Size:
· Inner Diameter: 11.7 cm (4.61')  
· Suitable for neck circumference up to 35 cm (1' 1.78')

Height: 2.2 cm (0.87')  
Thickness: 0.5 cm (0.2')

DETAILS

· Material: Stainless Steel  
· Built-in lock cylinder, lockable  
· Includes 1 key  
· Fixed O-ring 
· Weight: 0.4 kg (Women's Size), 0.45 kg (Men's Size)