Terms & glossary

A triangular piece of fabric inserted into a seam or hem to add extra flare and fullness to a skirt, dress, or sleeve.

In industry usage, the process of mathematically scaling a base pattern up and down to create a full, consistent range of sizes for production.

Trimming layered seam allowances to different, staggered widths so the layers taper gradually and do not create a visible ridge under the fabric.

The lengthwise direction of woven fabric threads, running parallel to the selvedge, that pattern pieces must be aligned to so a garment hangs and fits correctly.

The double-headed arrow printed on a pattern piece that shows how the piece should be aligned with the fabric's lengthwise grain when laid out.

A heavy, openwork lace in which the decorative motifs are held together by connecting threads rather than by a net background fabric.