This 1mm thin Silver S Chain is made with tiny "S" shape Links, its very light and very strong 16 inches long Solid Sterling Silver Made in Italy Nickel Free Hypoallergenic Excellent Quality This Serpentine Chain Is Sterling Silver, Made in Italy. it is a very Fine and Sparkling Chain measuring less than 1/32 inch (1.0 mm) Thin. A good chain for small and light weight charms. And as in all the chains we carry, it is Nickel Free so it's Hypoallergenic.