These SENCH Side threading needles are nickel-plated with golden eyes. They come in four sizes only (3 of each). These sewing needle sizes are the most commonly used sizes for general sewing tasks such as mending a hem, replacing a button, or doing embroidery work on a pillowcase with 2 or 3 strands of floss.
To thread these sewing needles, simply make a loop around the needle and tighten it. Then pull the tightened loop into the opening on the side of the eye.