Swarovski 3188 Lochrosen Rhinestones are very popular in pageant gowns. They have one hole in the center which allows you to attach with a bead, or another popular option is to use a clear thread and sew them continuously in a row. Can be sewn on by hand or by machine. These crystal "sequins" come in a variety of sizes and colors, something for every design!

The 3188 Lochrose Crystal shown here is 3mm Crystal.