Sew a summer dress: fit and flare with puff sleeves

A fit-and-flare summer dress is a fitted bodice, shaped with darts, joined at the waist to a skirt that flares out; this version has a gathered skirt and short puff sleeves. The sewing order is darts, shoulders, neck facing, skirt, side seams, skirt to bodice, invisible zip at the center back, then the sleeves, gathered at the cap and finished with elastic, and finally the hem. It is an intermediate project: plan a weekend, and test the bodice in cheap cotton first.

What pieces and notions does the dress need?

• Bodice front, cut on the fold, with bust darts and waist darts.
• Bodice back, cut as a pair, with waist darts and a center back seam for the zip.
• Front facing on the fold and back facing as a pair, both interfaced.
• Skirt front on the fold and skirt back as a pair: rectangles whose total width is the bodice waist times the gathering ratio, 1.8 by default.
• Sleeves, cut as a pair.
• Optional: four pocket bags and a tie belt.

Notions: a 50 cm (20 in) invisible zip, about 40 cm (16 in) of lightweight fusible interfacing, and narrow 6 mm (1/4 in) elastic for the sleeves, about twice your upper arm measurement in total.

Which fabric works, and how much?

Cotton poplin and cotton lawn are the easiest: they press crisply, gather evenly and hold a puff sleeve up. Chambray, gingham and broderie anglaise behave much the same. Viscose and crepe give a softer, more fluid dress, but the sleeves droop rather than puff, and the fabric shifts while you cut.

For a knee-length dress, plan on about 2.2–2.5 m (2 3/8–2 3/4 yd) of 140–150 cm (55–60 in) fabric; a midi adds about 50 cm (20 in), and 110 cm (45 in) fabric needs around 3 m (3 1/4 yd). These are typical figures for an average size; check your own before you buy, especially with a large print you want to center or match.

How do you get the bodice to fit?

A fit-and-flare dress depends on its bodice. It is drafted close to the body, with about 6 cm (2 3/8 in) of ease at the bust and 4 cm (1 5/8 in) at the waist, so there is little room to hide a mismatch. Before cutting the good fabric, make a toile of the bodice alone in cheap cotton, with the zip seam pinned closed.

Check four things on the toile:

• The waist seam sits on your natural waist, not above or below it.
• The bust darts point at the fullest part of the bust and stop about 2 cm (3/4 in) short of it.
• The neckline lies flat without gaping.
• The shoulder seams sit on top of the shoulders.

If you need a lot of extra room at the bust, the post on the full bust adjustment explains what it does and when a made-to-measure draft makes it unnecessary.

How do you sew the dress, step by step?

1. Cut, mark and interface. Transfer the dart points and notches, and fuse interfacing to the facings.
2. Staystitch the bodice necklines 1.2 cm (1/2 in) from the edge.
3. Darts. Sew the bust darts, then the waist darts, tying off the threads at the points. Press bust darts down and waist darts toward the center. The dart guide shows how to get a smooth point.
4. Shoulders. Sew the bodice shoulders and the facing shoulders, and finish the outer edge of the facing.
5. Neck facing. Sew the facing to the neckline right sides together, grade and clip the allowances, understitch, and press it to the inside. Leave the center back ends free for the zip.
6. Skirt. Sew in the pocket bags if you want them, then the skirt side seams. Run two rows of long gathering stitches along the waist edge.
7. Bodice side seams, then finish all the seams.
8. Join skirt to bodice. Match the side seams and the center front, pull up the gathers to fit, and sew with the gathered side up so you can keep the folds even. The gathering guide has tricks for long edges.
9. Zip. Insert the 50 cm invisible zip in the center back seam through bodice and skirt, sew the seam below it, then fold the facing ends over the zip tape and stitch them down by hand.
10. Sleeves. Sew each sleeve seam, gather the cap (see below), and set the sleeve into the armhole.
11. Sleeve hems. Make a casing at each sleeve hem and thread the elastic.
12. Hem the skirt with a double-fold hem on the 2.5 cm (1 in) allowance, and press.

How do you sew puff sleeves that actually puff?

A puff sleeve is cut wider than a plain sleeve, by about 45 % of the upper arm, and its cap is drafted taller and about 6 cm (2 3/8 in) longer than the armhole, so the extra can be gathered in. Sew two rows of gathering stitches between the front and back notches only, then pull them up so most of the fullness sits within 10 cm (4 in) on either side of the shoulder point. Pin the sleeve into the armhole at the underarm, the notches and the shoulder before you adjust the gathers, and sew with the sleeve on top.

At the hem, the elastic is cut at about 90 % of your upper arm: 25 cm (9 7/8 in) for a 27.5 cm (10 7/8 in) arm. That holds the puff without marking the skin. For an even fuller puff, sew a strip of tulle or organza into the top of the cap as a sleeve head.

Which options change the look?

The same pattern makes very different dresses. The skirt can be A-line, gathered or a half circle; sleeves range from straps, sleeveless and cap to short, elbow, three-quarter and long, in fitted, straight, puff or bell shapes; necklines include round, scoop, V, boat and square. Sewly's fit-and-flare dress pattern redraws instantly when you change any of them, and its 3D preview shows the new silhouette on a mannequin built from your measurements before you cut. It shows proportions, not an exact simulation of how your fabric will drape.