This choker necklace has a 25x3mm bar. The choker is adjustable up to 16 inches.. Perfect for layering, too! This collection of 14k gold and sterling silver chokers have been creatively designed with an adjustable lock that will satisfy every unique style and is available in an array of beautiful designs! Rhodium-plated sterling silver. ABOUT RHODIUM PLATE: Rhodium is hard-wearing, non-tarnish, and is the same metal used to plate white gold!