Colorful Stitch Stoppers slide all the way on to your needles (not just the tip) to hold stitches. Use them to turn any double-point or circular needle into a stitch holder. Slide the Stitch Stoppers onto circular needles or interchangeable needle cords to keep stitches secure while you are trying on your top-down knitted garments. Accommodate needle sizes US 0–15 (2–10 mm). 4 each of 6 sizes; 24 pieces. Made of EVA foam.