shankknopen

Shankknopen, or shank buttons, are a type of button distinguished by a small raised loop, or shank, on the back. The shank provides a gap between the button and the fabric, allowing thick or textured fabrics to close without crowding the buttonhole. This makes them a popular choice for outerwear and heavier garments where a flat button would sit too tightly against the fabric.

The shank may be a separate loop of metal or plastic, or it can be formed by winding thread. Buttons come in many materials, including plastic, metal, shell, wood, or horn. The choice of material affects durability, weight, and the overall appearance of the garment. In sewing, the shank can be integral or created by wrapping thread around the base behind the button to form a small stem.

Shank buttons are commonly used on coats, jackets, and other outerwear, where the space behind the button helps reduce wear on the fabric and allows for thicker layers such as lining or padding. They are also used for garments with substantial fabrics or for decorative purposes. Sewing them requires leaving a small stem of thread behind the button by wrapping the thread under the button before tying off, which creates the necessary clearance.

Care and replacement: if the shank loosens or the base button becomes damaged, the button should be replaced with one of equivalent shank size to maintain proper clearance. Shank buttons are widely available in fashion and craft supplies and come in a broad range of styles.