• They say shamrocks bring good luck so make sure to wear plenty of our shamrock bead necklaces on St. Patrick's Day. These metallic green shamrock necklaces come 12 per pack so wear them all yourself or hand them out to St. Patrick's Day revelers. Our shamrock bead necklaces are 33" and will fit most. These shamrock necklaces look great all together or by themselves and will save you from being pinched on St. Paddy's Day for not wearing green.