For 12mm Square Crystal: Start with 32 seed beads to form a loop. Use a netting technique to create corners with 7 beads, then connect with rows of 6 beads.
For 10mm Rivoli Crystal: Reduce to 24 seed beads for the initial loop. Adjust the corner and connecting bead counts accordingly.
For 8mm Chaton Crystal: Use 20 seed beads for the starting loop. Modify corner peaks to 5 beads, and connect using fewer beads due to the smaller crystal size.
Assemble the earring components using jump rings and attach to ear wires.