Art Deco Collar Necklace Ruby Red Squares and Elongated Silver Ovals. This magnificent collar necklace measures 15.5 inches from end to end. Jazz Age Flappers would often wear these necklaces to create an illusion of a collar on a strapless or tea strap dress. This necklace can be worn alone or layered with long strands of brightly colored flapper beads as was done back in the Gatsby Era. We can include a silver necklace extender so you can increase the wearable length. This necklace is Circa 1920 and in very good condition.