Pleating

Pleating and gathering solve the same basic problem — fitting a wider piece of fabric to a narrower edge — but they read completely differently. Gathering gives you soft, random fullness; pleating gives you crisp, repeatable folds with a defined structure: knife pleats all facing one direction, box pleats facing away from each other in pairs, accordion pleats zig-zagging continuously. The choice is almost entirely about the silhouette you want, not really about ease of construction — pleating is usually the fussier of the two.

Precision is everything here in a way it isn't with gathering. Every pleat needs to be marked identically — same depth, same spacing — or the unevenness reads immediately once the garment is worn, especially under any tension. I mark every fold line and placement line with a tracing wheel before I fold a single pleat, then pin and baste the whole set before it goes anywhere near the machine.

How I do it:

1. Mark each pleat's fold line and placement line on the wrong side of the fabric, keeping depth and spacing identical throughout.
2. Fold each pleat along its marked lines and pin in place, checking the full set lies flat and even before sewing.
3. Baste along the top edge to hold the pleats before attaching that edge to a waistband, yoke, or bodice.
4. Press firmly along each fold — for crisp pleats that hold, steam and a hard press make the difference; softer fabrics may need pleats stitched partway down to keep their shape.