This ELAN shank button is a sew-on closure designed for garment making, mending, and accessory projects, and it suits many common button-and-loop applications. Each card includes 4 button(s) sized 13 mm (1/2 in), with the raised back providing thread clearance on layered or thicker fabrics. Stitch by hand through the shank using a strong thread, then confirm the buttonhole fit and movement before finishing your knots for consistent wear.