How a Waistcoat Should Fit

A waistcoat can make an outfit look considered or awkward, and the difference is entirely in the fit. It sits closer to the body than a jacket, so small errors show. Here is how a waistcoat should fit.

Close, But Not Tight

A waistcoat should follow the shape of your torso closely, closer than a jacket, but without pulling at the buttons or straining across the chest. If the front gapes open or the buttons strain, the fit is wrong. Because it sits so close, a waistcoat is one of the pieces that benefits most from being made to your measurements.

Cover the Waistband

The most common waistcoat mistake is length. It should be long enough to cover your trouser waistband completely, so no shirt shows between the waistcoat and the trousers when you stand. A gap of shirt there is the sign of a waistcoat cut too short, and it undoes the clean line a waistcoat is meant to create.

Lie Flat and Leave the Last Button

Across the chest, a waistcoat should lie flat without pulling or ballooning. And keep the bottom button undone, which is both tradition and what lets it sit properly over the hips. Get the closeness, the length, and that last button right and a waistcoat pulls a three-piece suit together beautifully.

FAQ

How should a waistcoat fit?

Close to the body without pulling, flat across the chest without gaping, and long enough to cover the trouser waistband so no shirt shows at the bottom. The bottom button stays undone. Get these right and a waistcoat sharpens the whole outfit.

Should a waistcoat cover the waistband?

Yes. A waistcoat should be long enough to fully cover your trouser waistband, so no shirt shows between the waistcoat and trousers when you stand. A gap of shirt there means the waistcoat is cut too short.

Do you leave the bottom button of a waistcoat undone?

Yes. Leaving the bottom button undone is both tradition and practical, since it lets the waistcoat sit properly over the hips. The other buttons stay done up for a clean line.