These DecoBob pre - wound bobbins are perfect for sewing enthusiasts and embroidery lovers. Use them for various sewing projects like making clothes, home decor items, or detailed embroidery designs. Each pack comes with 36 bobbins of size L (100m / 110yds), filled with a 2 - ply cottonized polyester thread in white color. They are easy to use and will help you achieve professional - looking results in your sewing and embroidery work.