The Prym bias bars are ideal for the production of short bias binding of up to 30.5 cm in length for appliqués such as the stem of a flower. By cutting the fabric strip at an angle of 45 degrees to the grain of the fabric, the material becomes flexible and easy to work perfectly, even in curves. The bias bars are heat resistant, so that the seam of the bias binding can be ironed, while the bar is still wrapped in the fabric. The five bars included are 31.5 cm long and have widths of 3 mm, 4.5 mm, 6.5 mm, 9.5 mm and 12.5 mm.