Classic four‑hole sew‑on buttons in 15mm (5/8"), supplied 3 per card. Four holes allow strong parallel or criss‑cross stitching for dependable hold. Suitable for shirts, dresses, trousers, uniforms, knitwear and accessories, plus general mending. Install with standard needles and thread; knot securely and check spacing before sewing remaining buttons. Designed for reliable performance in everyday wear.