ELAN 4-hole buttons deliver a classic, stable attachment for shirts, knitwear and light outerwear. The card includes 1 button sized 20 mm (3/4 in); four sew-through holes distribute tension for a balanced stitch that resists twisting at stress points. Sew by hand or machine, confirm the size against your buttonhole, and backstitch or knot securely to withstand routine wear and laundering.