This is a huge, light blue, spiral molded plastic bangle bracelet. This massive bangle is 1 5/8" wide with super thick ribbed walls. It measures 2 5/8" across the opening and 8" around the inside. It has a foil label on the inside which reads "Made in Western Germany".
The bracelet is in excellent condition and is featured on page 121 of Plastic Bangles by Lyn Tortoriello & Deborah Lyons., Schiffer Publishing,c. 2005.