"ELAN tunnel?shank button in 21 mm (13/16 in) provides a clean, reliable closure for everyday sewing and wardrobe repairs. The Tunnel?shank back lifts button on bulky knits and smooth edges support easy hand or machine sewing while helping garments drape neatly without bulk. Choose white to blend or contrast on shirts, knitwear, uniforms or bags; match the diameter to existing buttonholes and reinforce as needed. ? 21 mm (13/16 in) diameter ? White finish/colour ? Tunnel?shank button ? For coats, cardigans, knitwear, bags"