Classic 4-hole sew-through buttons designed for secure attachment. Card includes 3 button(s) measuring 18 mm (3/4 in). The flat profile lies cleanly on shirts, uniforms and trousers, and four holes allow cross or box-stitching to spread stress for extra strength. Great for mending, school uniforms and handmade garments, as well as craft and bag projects. Sew by hand or machine; use appropriate needle and thread weight for your fabric and reinforce high-stress areas as needed.