Gathering draws a long fabric edge into a shorter length. The extra fabric forms many small folds, adding fullness at a skirt waist, sleeve head, or ruffle. Ruching uses gathered fabric as a visible design feature, often across an area or along one or more fixed lines rather than only at a construction edge.
Gathering with basting rows
The standard method uses two or three parallel rows of long straight stitches. Leave the ends unsecured, then pull the bobbin threads gently to shorten the edge. Pattern notches divide a long section so the fullness can be distributed evenly. A permanent seam secures the gathers; exposed basting is removed afterward.
For heavy or difficult fabrics, alternatives include zigzagging over a cord, using a gathering foot, or adjusting an overlocker’s differential feed. Test stitch length and method on a scrap because fabric weight, friction, and seam allowance all affect the result.
Ruffles, easing, and ruching
A ruffle has a free outer edge and displays the fullness deliberately. Easing distributes a much smaller amount of excess length with no obvious pleats, as when setting a sleeve into an armhole. Ruching describes decorative gathers held over an area, perhaps by rows of stitching, elastic, drawstrings, or channels.
Gathering versus shirring
Machine shirring usually consists of several parallel elastic rows, often sewn with elastic thread in the bobbin. It produces a stretchable panel and is not simply another name for gathering one edge into a seam. Usage varies in fashion descriptions, but retaining this distinction makes English instructions much clearer.