Single Breasted vs Double Breasted Jackets: Understanding Structure, Proportion and Style

What Is a Single Breasted Jacket?

A single breasted jacket fastens with one vertical row of buttons, most commonly one, two or three at the front.

Because there is little overlap between the two sides, the front stays clean and open, letting the lapels, shirt and tie create a strong vertical line through the torso.

The two button version is the most familiar in modern tailoring, though one and three button variations remain well established. Notch lapels are the usual pairing for a business jacket, while peak lapels give a stronger appearance.

Its adaptability is why the single breasted jacket remains central to menswear. Depending on cloth and proportion, it moves naturally between business, weddings, evening occasions and more relaxed tailoring.

What Is a Double Breasted Jacket?

A double breasted jacket is defined by a wider overlapping front and two visible columns of buttons.

This additional overlap changes the geometry of the garment. More cloth travels across the torso, while the lapels generally extend further across the chest, creating stronger diagonal lines and a more pronounced visual structure.

Peak lapels are the traditional and most recognisable choice for double breasted tailoring.

One of the classic configurations is the 6x2: six visible buttons arranged in three rows, with two possible fastening positions on the working side. Other established configurations include the lower buttoning 6x1, as well as 4x2 and 4x1 variations.

Inside the jacket, a concealed fastening known as the jigger helps secure the underlapping front and keeps the jacket sitting correctly when worn.

A double breasted jacket is therefore not simply a single breasted jacket with additional buttons. Its balance, overlap and proportions are conceived differently from the outset.

A Shared History in Tailoring

Single breasted and double breasted jackets are not modern alternatives created for different levels of formality.

By the late nineteenth century, both single breasted and double breasted versions of the lounge or sack suit were already established within menswear. Double breasted clothing also developed strong associations with military, naval, sporting and leisure dress, while garments such as the reefer jacket became established elements of nineteenth century menswear.

As the modern lounge suit evolved, both configurations became enduring parts of the tailored wardrobe.

Their popularity has shifted repeatedly with fashion. At various moments, double breasted tailoring has represented authority, elegance and formality, while at others it has appeared in softer, more relaxed forms. The single breasted suit, meanwhile, became the dominant everyday choice across much of twentieth century business dress.

Neither form has ever truly disappeared. What has changed most dramatically is proportion.

The Importance of Button Placement

Button placement has a significant influence on the appearance of both jacket styles.

On a single breasted jacket, the fastening point helps determine the apparent length of the lapel and the balance between the upper and lower sections of the jacket.

A higher buttoning point creates a more contained front, while a lower fastening point produces a longer lapel line and a more open chest.

The same principle becomes particularly important in double breasted tailoring.

A traditional 6x2 configuration creates a balanced and immediately recognisable double breasted silhouette. A lower buttoning 6x1 arrangement can create a longer lapel line and a more dramatic, elongated appearance.

These details may appear subtle individually, but collectively they determine much of the character of a bespoke jacket.

Is a Double Breasted Jacket More Formal?

There is no absolute hierarchy of formality between single breasted and double breasted jackets.

A double breasted suit can appear more pronounced or dressy because of its overlapping front, peak lapels and stronger visual structure. Historically, however, double breasted tailoring has appeared across business, leisure, sporting and formal dress.

The single breasted suit became more common in everyday business wear, but that does not automatically make it less formal.

A navy double breasted suit in a fine worsted wool can be entirely appropriate for business, while a softly constructed double breasted jacket in linen, hopsack or textured wool can feel distinctly relaxed.

Likewise, a sharply cut single breasted suit in a dark formal cloth can appear more refined than a casually constructed double breasted jacket.

Formality is determined by the garment as a whole. Cloth, colour, construction, lapel treatment, shoulder line, button stance and styling all matter alongside the fastening.

Which Should You Choose?

A single breasted jacket offers a cleaner, more open front and is generally the more versatile option. A double breasted jacket introduces more overlap, stronger lapel lines and a greater sense of presence.

In bespoke tailoring, neither style is fixed. Button stance, lapel width, jacket length, waist shape and shoulder line can all be adjusted to suit the wearer and the purpose of the garment.

At Country Road Fashions, the decision is therefore made in the context of the client, the cloth and how the jacket will be worn.

The best result is not simply a single breasted or double breasted jacket. It is a jacket whose proportions, construction and character all work together naturally.