Binding Cut on an Angle, Used in Dressmaking

Puzzle 19 of Dressmaking Easy Pack

Question is: Binding Cut on an Angle, Used in Dressmaking

and the answer is: BIASTAPE

Word Meaning:

BIAS TAPE — (textiles) A narrow strip of fabric, cut on the bias (diagonally across the weave, for greater stretchiness), used in making piping, binding seams, finishing raw edges, etc.

Definitions from Wiktionary.