Madeira Decora No. 12 thread is a decorative serger thread used to embellish seams and create decorative overlock treatments for apparel or home décor projects. It is also great for quilting! Made of 100% rayon, this thread has a high tensile strength which allows high stitching speeds like those of embroidery machines and sergers. Decora thread has a beautiful high sheen for the perfect stunning stitched embellishments! Each spool contains 330 yards of thread.