Hairpin Crochet Bridal Choker Necklace Skill level: Intermediate. Crochet Materials: Heirloom Crochet hook size 3 mm Crochet yarn 100 % wool in white Sewing needle Scissors Crochet Bridal Choker Necklace Instruction. This pattern uses US stitch abbreviation. Set the Heirloom on 3rd smallest setting. Step 1. 60 loops each side with sc in the middle.