A simple continuous aggregate of fibres that is suitable for textile construction. The composition of threads varies from single strands of fibrous material, untwisted but knotted to achieve length to spun yarn which is plied or twined for added strength and thickness.

Embroidery can be sewn with many types and sizes of threads depending on the desired finished appearance. Embroidery threads are commonly made from rayon, polyester, cotton and metallics. Rayon threads are generally made with a twisted multifilament construction and have a high sheen. Polyester threads can be made in three different thread constructions including a twisted multifilament, air entangled and spun construction. Obviously, cotton threads are only made in a spun construction. Both spun polyester and spun cotton thread have a “matte” or low sheen appearance. Rayon and Polyester filament threads have a high sheen. Polyester is stronger than Rayon and has superior color fastness and abrasion / chemical resistance. Metallics are filament threads that have the highest luster and are formed with a synthetic core wrapped in metal foil. Generally metallic threads do not sew as well as polyester or rayon threads. The most common ticket size for rayon or polyester embroidery threads is a No. 40, however other sizes are available. A&E’s Signature polyester embroidery thread comes in a variety of sizes including a No. 40, 30, 20, 10 and 3004 used for serging appliqués.