This ELAN 4-hole button is a sew-through closure for apparel construction, repairs, and everyday craft use, and it suits many common buttonhole applications. Each card includes 3 button(s) sized 15 mm (9/16 in), with four holes that support balanced stitching and a secure attachment. Sew with matching thread and reinforce high-stress placements, especially on items that see frequent wear and laundering, to help prevent loosening.