To make a small hair bow, between 11 and 28 inches of ribbon are needed. Between 12.5 and 32 inches of ribbon are needed to make a medium-sized hair bow. To make a large hair bow, 36 inches are needed.
The amount of ribbon needed to make a hair bow varies by the width of the ribbon. The larger the ribbon width, the more ribbon length is needed. The lengths listed above reflect the lengths of ribbon needed to make boutique style hair bows. Simpler styles of hair bows typically require less length of ribbon than do more complicated styles.