Double breasted is the fastest way to get a waist back. THE ROW's Paden and Victoria Beckham's Beatrice keep the button stance high so the jacket closes across the ribcage, while Balenciaga's Hourglass houndstooth does the shaping with the cut rather than the closure. Blaze Milano and Loro Piana sit somewhere in between.

The Blaze Milano Everyday is the softer shoulder of the two, cut to be thrown on over anything. The Gabriela Hearst Angela is built with more structure, so it holds a waist on its own.

The Khaite Rolo in velvet is the evening version, where the fabric carries the whole look. The Loro Piana Genny in linen and wool is the one that works through a warm afternoon.

The Balenciaga Hourglass pulls the waist in hard and flares at the hip, so the pattern moves with it. The Row Paden does none of that and relies on cut alone.

Fabric is doing half the work. Tweed, mohair and wool crepe hold a shoulder line that soft linen cannot, which is why Jil Sander's wool and mohair blend and Dries Van Noten's wool crepe look structured with nothing underneath. Acne Studios goes checked, Blaze Milano goes pinstriped, and both read sharper than a plain navy.

The Acne Studios layered check reads as two jackets from a distance. The Dries Van Noten wool crepe is the quiet one, with a drape that softens the shoulder.

The Blaze Milano Charmer keeps a fine pinstripe that stays subtle outside close range. The Calvin Klein Collection Cordelia is plain twill, cut narrow through the body.

The Jil Sander wool and mohair blazer has a faint halo to the cloth that catches light. The Saint Laurent wool and silk is smoother and shinier, which pushes it towards evening.

Then there is the literal version. A belt or a peplum puts the emphasis exactly where you want it, and Magda Butrym, Nour Hammour and MM6 all take that route in different weights. Zimmermann's cropped two tone and the Comme des Garcons peplum jacquard are the ones to try if a straight blazer has never sat right on you.

The Comme des Garcons peplum jacket builds the waist into the pattern cutting. The MM6 gabardine takes the simpler route and cinches it with a belt.

The Nour Hammour Kerry in suede is the warmest of these and softens with wear. The Zimmermann Valiant is cropped and two tone, so it sits above a high waistband.

The Liberowe printed cotton jacket is the one to wear when the rest of the outfit is plain. The Magda Butrym belted gabardine does the opposite and lets the shape speak.

If you take one thing away, it is that fit beats fabric here. A plain jacket that closes at your actual waist will look better than a grand one hanging off your shoulders, and every piece in this edit is cut to be buttoned rather than worn open. Try the double breasted ones done up before you decide they are not for you, because unbuttoned they lose the entire point. The belted jackets are the easiest entry if you are coming off a few years of borrowed fit, since you can move where the waist lands. Wool and tweed will hold their shape through a winter of wear. Unlined cotton will not, and that difference starts showing by the third month.