From the 1960s this genuine DuPont Lucite bangle bracelet is the one photographed in the book "Plastic Bangles", Schiffer 2005 Tortoriello/Lyons. Thick and chunky! Statement piece! Transparent Lucite with age appropriate slight yellowing. It measures approx. just shy of 1 18" wide with walls 3/4" thick! and an inside diameter of 2 1/2". No chips or cracks and only expected vintage light surface scratches when studied closely. 6