Classic 3  ring bondage collar  

1 inch wide  vegan BioThane ™️. Strap

with 3 heavy duty nickel plated rings  and a  chrome

roller buckle closure

it is available in 3 sizes

Small- 11 1/2 to 13 1/2 inch neck size  

medium - 13 1/2 to 16 1/2 inch neck size 

large - 151/2 to 17 1/4 inch neck size