Bias Tape ~ 1/2" Wide Double-fold Bias Tape ~ Black ~ Poly Cotton (10 Yards / Pack)Binds straight or curved edges. Color accent for home and apparel. No ironing needed. Colorfast. 1/2" (13mm) wide 50% Polyester / 50% CottonBias tape can be used on almost any raw edge of fabric. It is perfect for a decorative finish on a curved edge. It can be used in many quilting techniques and sewing projects.