Looking for the absolute best sparkle in your accent beads? The Swarovski 3mm round's (5000) multi faceted design offers a great touch of dazzled when combined with other beads. The 3mm round is the perfect size for pairing with seed bead designs. Looking for the absolute best sparkle in your accent beads? The Swarovski 3mm round's (5000) multi faceted design offers a great touch of dazzled when combined with other beads. The 3mm round is the perfect size for pairing with seed bead designs.