80 WHITE RONDELLE FIBER OPTIC CATS EYE 4MMX8MM BEADS ~cat26. FIBER OPTIC CATS EYE BEADS! Color: White. Size:4mmX8mm 80+/- Beads. Shape: As Pictured, Rondelles. 1 inch = 25.4 millimeters. All photos are enlarged to show detail. All monitors are not created equal and some colors will vary.