Czech Fire Polish Glass Beads 6mm Round Rosaline AB (25) Czech Fire Polished Beads In color "Rosaline AB." The AB finish is a rainbow effect applied to 50% of the surface of each bead, for beautiful reflections throughout Measurements: 6MM long, 5.5MM wide. In Czech Fire Polished beads, the shape called "Round" is actually more of an oval. Quantity: 25 beads, which is approximately 6 inches of beads when strung.