This ELAN four-hole button set is a practical choice for garment repairs, replacements, and sewing projects on shirts, sweaters, and light outerwear. Each card includes 2 buttons sized 20 mm (¾"") with four sewing holes for a flat attachment and added stability to help reduce twisting during wear. Check the existing buttonhole before sewing, use matching thread through all holes, and add extra stitches at stress points for a secure finish.