These ELAN sew-through buttons are sized for everyday garment sewing and repairs on shirts, cardigans, dresses, and lightweight outerwear. Each card includes three 18 mm (¾ in) 2-hole buttons that stitch on flat for a clean, classic look and quick replacements in your sewing kit. Measure your existing buttonhole first, then sew on with matching thread and follow the garment care label once the buttons are attached.