Handmade tutorial for retro-style fabric butterfly hairpins.
Materials: Small pieces of retro-flavored non-woven fabric, needle and thread, scissors, and metal hairpin fasteners.
Steps: Sew the two pieces of fabric together, and meet a circle of topstitching inside the outer outline; then fold it into the shape of a butterfly, then fix it with needle thread and sew the butterfly to the hairpin fastener.