Shank‑back buttons sized for coats, cardigans and structured projects. The raised shank protects thread and lets the button sit above thick fabrics for a clean drape. Edges are smooth for easy handling and a professional finish on jackets, knitwear and bags. Match the 21 mm (7/8in) size to your buttonhole and seam details. Each card includes 1 button(s). Test placement on fabric scraps and reinforce with interfacing where needed.