Flat, sew-through 4-hole buttons in 15 mm provide a classic, durable closure for everyday garments and accessories. Multiple holes allow secure cross or parallel stitching that spreads stress on shirts, cardigans and craft projects. Card includes 4 buttons. Attach by hand or with a button-sewing machine foot. For thicker fabrics, leave a small thread shank so the button sits above the cloth and closes smoothly without strain.