Reliable 4-hole sew-through buttons from ELAN sized 13mm (1/2 in) for everyday garments and craft work. Each card includes 4 button(s). Four holes distribute strain for durable closures that hold up to repeat wear and laundering. Easy to attach by hand or machine, with a flat profile that suits shirts, uniforms, knitwear and light outerwear. Great for replacing missing buttons or completing multi-button plackets. Match button size to your buttonhole for best results.