A bias tape is a 100% cotton narrow strip of fabric that is cut diagonally (at a 45° angle) across the fabric’s weave, known as the bias. Cutting on the bias makes the tape slightly stretchy and flexible, allowing it to curve smoothly around edges and shapes—something straight-cut fabric cannot easily do.
Here’s what characterizes a bias tape:
Shape and form: It’s a long, narrow strip, usually folded once or twice along its length.
Types:
Single-fold bias tape: The raw edges are folded once toward the center.
Double-fold bias tape: The strip is folded twice, so all raw edges are enclosed.
Material: It’s made from lightweight woven fabric such as cotton, polyester, or satin.
Function: Used to finish raw edges, bind seams, or decorate garments and sewing projects.
In short, a bias tape is a flexible fabric binding used for edging, finishing, or trimming, giving garments and accessories a neat, durable, and often decorative finish.