With that said, the blazer is the most important part of any suit – and the style and construction of the blazer you choose change the entire aesthetic.

How much do you know about blazers? Here, we’ll discuss three of the most important blazer details you should know about so that you can make an informed purchase.

Single-breasted and double-breasted blazers

A single-breasted blazer is the most common jacket style, and it buttons at the front with one to four buttons.

A double-breasted blazer is a lot more sophisticated and formal. It can have four, six or eight, buttons and is characterised by extra fabric that folds over from the left to the right in the front.

Double-breasted blazer
Single-breasted blazer


Lapels come in three main forms and these can be designed in a variety of ways, including notch, peak and shawl lapels.

The most common type is the notch lapel, and it’s characterised by the top of the lapel and bottom of the collar meeting in a notch. The peak lapel, which is most often found on double-breasted blazers, has edges that point in the direction of the shoulder.

And finally, the shawl lapel – which is the most formal one of the three – is characterised by one continuous curve that doesn’t break anywhere. These lapels are mostly seen on tuxedos.

Notch Lapel
Peak Lapel
Shawl Lapel


Suit jackets also come with vents, otherwise referred to as slits, at the lower back of the jacket. There are three styles of vents: the first of which is no vent at all, the second is a jacket with a single vent and the third is a jacket with two vents.

The ventless jacket style is known to be a lot more fitted. A jacket with a single vent will have the slit right in the middle of the lower back of the jacket and a jacket with two vents will have a slit on each side of the jacket.

While vents do play an aesthetic role, they also impact freedom of movement. For example, the back of a ventless jacket will often get bunched up or crease when you sit down or put your hands in your pocket. Vented jackets don’t do this.

Single vent
Double vent

Always try a blazer on before making a purchase and see how you feel, move and sit in it. From there you can make your decision based on the way it looks and how comfortable it feels.

Additional source: Real Men Real Style 

All images sourced from Pinterest