Colorful EVA foam plugs that slide all the way onto needles (not just on the tip) to secure your stitches. They also slip onto interchangeable needle cords to keep your stitches from sliding off while you try on your top-down garment or use your needles elsewhere. Stitch Stoppers work for needles from US 0-15 / 2-10mm. Includes 24 pieces total (4 each of 6 sizes).