How to Sew a Pleated Midi Skirt in Lightweight Fabric

Every pleat is a fold of fabric that takes up width at the waist and releases it below. What changes between pleat types is the direction of the folds and how they meet. The choice affects the look of the skirt, the amount of fabric needed and how much work the pressing will take.

Knife pleats all face the same direction, usually turning toward the left side seam or toward the back. They give a smooth, rhythmic surface and a lot of movement. Box pleats are pairs of folds turned away from each other, creating a flat panel on the outside; they read more structured and sit slightly fuller. Inverted pleats are the reverse, with the folds meeting in the center on the outside, and they are often used as single pleats at the front or back of an otherwise plain skirt.

• Knife pleats: maximum swing, the classic choice for a light, all-around pleated midi.
• Box pleats: fuller and more architectural, good in crisp cottons and suiting.
• Inverted pleats: controlled, usually placed singly or in small groups.
• Sunray or accordion pleats: heat-set by specialists, not practical to set at home in most fabrics.

A lightweight pleated skirt needs a fabric that takes a press, yet still drapes. Fibers that respond well to heat and steam are the safest choice. Wool crepe, lightweight wool gabardine and tropical suiting take a sharp fold and recover well after sitting. Fine cotton such as poplin or lawn presses beautifully but creases with wear, so the pleats soften during the day.

Polyester and polyester blends are the fabrics most often chosen for permanent pleats, because synthetic fibers can be heat-set. At home you can sharpen them with a hot iron and a press cloth, but test first: too much heat can leave a shine or melt the surface. Silk crepe de chine and georgette make beautiful, fluid pleats but are slippery to mark and press, so they suit sewists who are comfortable with fine fabrics.

Avoid very soft rayon and loose weaves unless you want the pleats to drop into soft folds rather than defined lines. If you are unsure, fold a scrap, press it, then crush it in your hand for a minute and see whether the fold returns.

A pleated skirt is only as good as its marking. Each pleat has two lines: the fold line, which becomes the visible edge, and the placement line, where that fold lands. Mark both on the right side of the fabric with tailor's tacks, thread or a marking tool that disappears with heat only after you have tested it, because some pens set permanently when ironed.

Work on a large flat surface. Fold each pleat along its fold line, bring it to the placement line and pin through all layers at the waist, then at the hip and at the hem. Hand-baste the pleats in place from waist to hem before any pressing. On a skirt with many pleats this takes time, but basting is what keeps the folds parallel when the fabric is moved to the ironing board.

1. 1.Cut on grain, with the pleat lines running parallel to the selvage.
2. 2.Hem the panels first if you want a perfectly sharp pleat at the hem edge (see the hem section).
3. 3.Join the panels, matching the seams to fall inside a pleat fold where possible.
4. 4.Mark fold and placement lines, fold, pin and baste.
5. 5.Press, let cool, then stitch the pleats at the waist.

Pressing sets a pleat; ironing moves fabric around and can distort it. Lower the iron, apply steam through a press cloth, lift, and move to the next section. Press the outside and the inside of each fold, and slip strips of brown paper under the fold edges so they do not leave ridges on the outer layer.

Let the fabric cool completely before moving it. Fibers set as they cool, and a skirt lifted while it is still warm and damp will soften its folds. For wool, a clapper pressed on the fold for a few seconds after steaming gives a much sharper edge. Some sewists apply a light mix of water and white vinegar through the press cloth on wool and cotton to set the fold more firmly; test it on a scrap for marks and color first.

If you want the pleats to stay closed over the hip, edgestitch the inside fold of each pleat from the waist down to the hip line, or topstitch the outside fold to the same point. Below that, the pleats are left free to open and swing.

Pleated skirts depend on a precise waist. The pleats are calculated to take a set amount of fabric out at the waist and release to the hip, so if the waist measurement is off, every pleat ends up either overlapped or pulled open. Before attaching the waistband, baste the pleats closed at the waist edge and check the circumference against your waist measurement plus ease.

A straight waistband interfaced with a firm woven or fusible interfacing suits most lightweight pleated skirts. A contour or curved waistband sits better on a high-waisted style. Place the zip in a side seam or a center back seam, and hide it inside a pleat fold if you can, so the line of the skirt is not interrupted. An invisible zip is the usual choice in light fabrics; a lapped zip is sturdier in wool.

Elasticated waists are possible but they bunch the pleats at the top and soften the shape, so they work better on partly elasticated designs, such as a flat front with elastic only at the back.

The cleanest way to hem a pleated skirt is to hem it before pleating. Hem each panel flat, then join and pleat, so the fold runs uninterrupted into the hem. This requires knowing the finished length precisely, which is easier with a pattern drafted to your measurements than with a standard size.

If you hem afterward, open the pleats near the hem, unpick the seam allowance inside the fold for the depth of the hem, then press the seam open and trim it within the hem area. Re-fold and press. Wherever a seam falls at a fold, clip the seam allowance just above the hem so the fold can lie flat.

For lightweight fabrics, a narrow machine hem or a fine hand-rolled hem keeps the edge light. A deeper hem adds weight that helps the skirt hang straight, which suits wool crepe. Avoid a bulky hem in chiffon or georgette, where it shows through.

Pleats add volume below the hip, so balance them with a closer fit above: a tucked-in shirt, a fine knit or a short, fitted jacket. A tie belt or a waistband with tabs gives the waist definition. In lightweight wool, a pleated midi works with ankle boots in autumn; in silk or poplin it is a summer skirt for flat sandals.

Length matters. A midi that ends at the narrowest part of the calf usually looks most balanced; check the finished length with the shoes you plan to wear before hemming.

With pleats, small differences between your waist and hip and the standard size you choose are multiplied by the number of folds. A made-to-measure draft takes the waist and hip measurements you enter, so the pleat intake is calculated for your body rather than graded from a size chart.

Minerva Patterns drafts each pattern in garment-industry CAD to your measurements or to standard sizes. You choose the format when ordering: PDF for A4, US Letter, A0 or one long sheet, a projector file, PLT for a plotter, or DXF AAMA for pattern software, with or without seam allowances.