Material: Aluminum Chain, Alloy Rings The Carnal Slide Chain is made to order. It is made of iridescent aluminum chain. The O-rings are made of zinc alloy. The chain's links are 2.14 cm wide. The O-rings are 3 cm wide. The length is the length of the chain, not including the O-rings. If you require a custom size, please leave your measurements at checkout. I cannot guarantee that the metal is 100% nickel free, so keep that in mind if you have allergies. The chain on the mannequin is 60 cm long. To wear the slide chain, pass the chain through one of the O-rings to form a loop. Wear the loop over your head. To ensure you can do this comfortably, order a size 3-5 cm larger than your head circumference. Check out my FAQ for more information about the items I make and care instructions :) Colors may vary due to different monitor settings. Items photographed in daylight.