ELAN shank buttons use a raised loop back so fabric layers sit comfortably under the button for a clean, easy-to-fasten closure. This pack includes 4 buttons at 12 mm (1/2 in), suited to sweaters, coats, uniforms, children’s wear, and replacement work where a sew-through style may sit too flat. Stitch through the shank with strong thread, knot securely, and for heavy use add a small reinforcement stitch on the underside; keep spares organized and out of reach of children.