The Clover Flower Head Pins are great for general pinning and particularly useful for pinning lace, eyelets, and loosely woven embellishments. These pins will hold multiple layers of fabric together. The flatheads are suitable for machine stitching. These pins are not Heat Resistant, do not apply to iron directly. Diameter is .55mm, Length is 50mm; Pink Flower Heads ~ Top Quality Stainless Steel