Sewing aids are essential tools for any sewer. A PIN is a small, thin piece of metal with a sharp point at one end and a round head at the other, used for fastening fabric or other material together. A thimble is a small metal or plastic cup worn on the finger to protect it when pushing a needle through fabric. A PATTERN is a template used to create a garment or other item from fabric. All three items are essential sewing aids.