Material: 
*Spikes-Stainless steel 
*Base Material of the beaded collar : High quality highlight simulated pearl
Small size : approximately :30+10cm
Medium size : approximately 35+10cm
Large size : approximately 40+10cm
*For your reference, sizes S and M are generally recommended for women, and size L is typically suitable for men.
If the wearer has a fuller neck or prefers a looser fit, we recommend sizing up for comfort
Contact me for other size