Drafting a Waistband: Straight, Contoured and Elastic

A straight waistband is a rectangle cut on the straight grain, its length equal to the waist measurement plus an underlap for the closure and its width twice the finished height plus seam allowance so it folds double. It is the classic band on tailored trousers and skirts, stabilized with interfacing so it holds its shape.

The straight band works because the true waist is nearly cylindrical over a short height. Keep the band narrow, around three to four centimetres finished, and it sits cleanly. Make it too tall and it will not follow the body's curve above and below the true waist, and it will pinch or gape.

A contoured, or shaped, waistband is curved on the pattern to match the body's taper between the waist and the point where the band ends. It is used when the band sits above or below the natural waist, or when it is wider than a straight band can manage. Because the waist is smaller than the hip and the ribcage, a band spanning that zone must be curved, not straight.

Draft it by tracing the top of the skirt or trouser block over the band's depth, so the band inherits the block's waist-to-hip shaping. The result is a crescent-shaped piece, wider at the ends and curved along its length, that hugs the body instead of standing away from it.

1. 1.Mark the finished band depth on the skirt or trouser block, above and below the waistline as needed.
2. 2.Trace the block outline within that band depth, including the waist darts.
3. 3.Close the darts so their intake removes width from the band and it curves.
4. 4.True the top and bottom edges into smooth curves.
5. 5.Add seam allowance, interfacing lines and the closure underlap.

An elastic waistband trades a fitted band for comfort and pull-on ease. The garment waist is drafted larger than the body, gathered onto elastic that pulls it in. The elastic length is the key number: cut it to the snug body measurement, usually two to five centimetres shorter than the relaxed waist so it grips without digging in.

There are two constructions: a casing, where a tunnel of fabric holds the elastic and lets it move, and direct application, where the elastic is stitched to the fabric and stretched as you sew. The casing is more comfortable and easier to replace; direct application is flatter and used on activewear.

• Add an underlap or extension beyond center front for the button, hook or closure.
• Cut straight bands on the lengthwise grain so they resist stretching in wear.
• Interface straight and contoured bands to keep them crisp.
• For elastic casings, make the casing at least a few millimetres wider than the elastic so it slides.
• Mark the center front, center back and side seams on the band so it aligns with the garment.

Waistbands carry a lot of small but critical information: grain, fold lines, interfacing extent, underlap and elastic length. Recording these accurately is what makes the band reproduce correctly. Minerva Patterns supplies skirt and trouser patterns with their matching waistband pieces in DXF AAMA, PLT and PDF, with the band type and construction marks specified so the fit at the waist is preserved.

Match the band type to the garment: straight for tailored and structured pieces, contoured for wide or off-waist bands, elastic for comfort and pull-on styles. Each solves the same problem of fitting a curved body, in a different way.