Best Plastics Lucite bangles in black or evergreen with wide cream vertical stripes. The green measures 7/8" wide and the black measures 13/16" wide. Both bangles measure 2 9/16" wrist X 5/16" wall thickness. These are often mistaken as bakelite.
Also a pale orange lucite bangle with evergreen laminated section that measures 7/8" wide with just over 2 1/2" wrist opening and 5/16" wall thickness.