ELAN shank buttons are designed for closures where you need extra clearance, making them a practical choice for thicker fabrics, layered plackets, and knitwear. This card contains 4 buttons sized 12 mm (1/2 in) with a raised shank back that helps the button sit above the fabric for smoother fastening. Use strong thread and consider a small backing button on heavy materials to improve durability and reduce strain on the stitching.