How to Wear an Oversized Blazer Without Drowning in It

The short answer: an oversized blazer should look intentionally big, not simply too large. Look for a wide, strong shoulder, a roomy body and a sleeve that still ends near the wrist. Wear it open over something slim, with a lean line on the bottom: straight trousers, slim jeans, a mini skirt. Many oversized blazers are cut generously enough that the brand recommends one size smaller than usual; Blazé Milano advises exactly that for its Everynight and Nightbreak blazers.

The oversized blazer is the easiest way to make tailoring look modern, and the easiest to get wrong. The difference between borrowed-from-the-boyfriend and swamped is about two centimetres at the shoulder and the right thing on your legs. This is how to get it right.

Oversized versus too big

A blazer designed to be oversized is cut that way at the pattern stage: the shoulder is built out, the body is wide, the armhole is deep, but the proportions are balanced, so it hangs cleanly. A regular blazer two sizes too large is a different thing: the shoulders slide, the sleeves cover your hands and the hem drops in the wrong place.

Three checks tell them apart. The shoulder seam on an oversized jacket sits beyond your shoulder by design, but the jacket should not slip backwards when you move. The sleeve can be slightly long, but you should still see your hands. The front should hang straight down, not fold in on itself.

How to size an oversized blazer

Start with the brand’s own advice, because cuts vary enormously. Blazé Milano cuts its Everynight Blazer and Nightbreak Blazer for an oversized silhouette and recommends one size smaller than your usual for a more precise fit. Blazé Milano sizes 00, 0, I, II, III and IV convert to UK 4, 6, 8, 10, 12 and 14, so a UK 10 would usually take a I in the Everynight. If you want maximum volume, take your usual size; if you are petite, size down.

The best oversized blazers to buy now

Five ways to wear an oversized blazer

1. Over slim jeans and a T-shirt

The default, and the best. The width of the jacket against a narrow leg is what makes it work. Add loafers and you are done. More ideas in how to wear a blazer with jeans.

2. As a suit

An oversized jacket with a matching straight trouser is the modern trouser suit. Blazé Milano cuts the Everynight and the Fox Pants in the same cloths, so the Kasif, Langley, Saona and Novalis Wine sets all work this way; see every set in Blazé Milano suits.

3. With a mini skirt and boots

The brand designed its velvet Everynight to be worn with the matching shorts and mini skirt, an outfit that runs from day to evening. The Coci Mini Skirt in Jealousy Caramel and the Tinker Short match it.

4. Over a slip dress

Worn open over silk, an oversized blazer stops an evening dress from feeling too precious.

5. As a dress

Belted at the waist with nothing underneath but a slip, a long oversized blazer becomes a blazer dress. Keep the leg bare and the shoe simple.

Which colours and fabrics work best oversized

Volume shows the fabric, so the cloth matters more on an oversized jacket than on any other. A structured wool holds the shoulder and keeps the shape architectural; checks and herringbones break up the expanse of fabric and stop a big jacket looking like a block. Plain dark colours, navy, black, charcoal, look sleek and slimming even when the cut is generous. Lighter shades and velvets make more of a statement, so keep everything else quiet. The caramel cotton velvet of the Jealousy Caramel Everynight is a good example: rich enough to be the whole outfit, so wear it with denim and a white T-shirt.

Weight matters too. A light jacket in linen, cotton, a thin wool falls softly and suits warmer months; a heavy wool sits away from the body and gives the sharper, more dramatic line. For year-round wear choose a mid-weight wool.

The proportion rules

Big on top, slim below. An oversized blazer with wide trousers can work on tall frames, but it is advanced. Everyone else should keep the bottom half lean.

Push the sleeves. Showing the wrist makes a big jacket look lighter.

Mind the hem. On petite frames, choose an oversized blazer that finishes at the top of the thigh, not mid-thigh.

Add a shape at the waist. A belt over the jacket, a tucked shirt underneath: something to show there is a body inside.

Oversized blazers for petite and curvy figures

Petite. Choose an oversized cut with a defined shoulder rather than a dropped one, keep the hem at the top of the thigh, size down as the brand advises, and show some leg, ankle, wrist: these small details stop the jacket from swallowing you.

Curvy. An oversized blazer worn open creates two long vertical lines down the front, which is slimming. Wear it over a fitted layer that shows your waist, and choose a fabric with enough structure to hang straight rather than cling.

Tall. You can carry the most volume, including an oversized jacket with a wide trouser, which on a long frame looks deliberate.

Frequently asked questions

Should you size up for an oversized blazer?

No. Oversized blazers are already cut large, and many brands recommend one size smaller than usual. Blazé Milano, for example, advises one size smaller in its oversized Everynight and Nightbreak blazers.

What do you wear with an oversized blazer?

Something slim on the bottom, such as straight jeans, slim trousers, a mini skirt, with a fitted layer underneath, such as a T-shirt, a fine knit, a camisole.

How should an oversized blazer fit?

The shoulder can extend beyond your own, but the jacket should not slide backwards. The sleeve can be slightly long but should leave your hands visible, and the front should hang straight.

Are oversized blazers flattering?

Yes, when balanced with a lean line below and a little definition at the waist. Petite women should keep the length at the top of the thigh.

Can you wear an oversized blazer buttoned?

You can, but most oversized blazers are designed to be worn open.

Are oversized blazers still in style?

Yes. The oversized blazer has become a staple, and luxury labels continue to release it every season.

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