Navigating the world of men’s clothing can be tricky, especially when it comes to distinguishing between different types of jackets. While jackets and blazers may seem identical, there are subtle differences between the two that can affect an outfit’s overall style and formality. From the finish on the inside of the jacket to the shoulder cut, every clothing detail plays a role.
To ensure you always choose the appropriate jacket for any occasion, we’ll explain them explicitly in this article, as it is vital to understand the distinctions between a blazer and a suit jacket.
What is a Blazer?
A blazer is a men’s jacket of military origin, with a less rigid, more informal style than a jacket. It was first used to describe the red jackets worn by members of the Lady Margaret Boat Club in Cambridge around 1825. Blazers typically have a more relaxed fit than jackets and are a go-to everyday jacket for men, working well for both daytime and evening wear. You can buy a custom made blazer from Silailor.
What is a Jacket?
A man’s jacket is an outerwear garment designed to be worn with matching trousers for a formal appearance. The term “jaquette” was first used in the 14th century for a longer, embroidered outerwear, while the Sakko or sports coat of the 19th century was more similar to a modern jacket. While traditionally worn with matching trousers, it is now acceptable to pair jackets with different pants, such as jeans or chinos, for a more casual look.
Six Major Differences between Jackets and Blazers
Let’s have a look at some of the most prominent differences between jackets and blazers.
1 – Common Types
Common Types of Jackets:
- 2-button single-breasted (most common)
- 3-button single-breasted (ideal for taller men)
- 6-button double-breasted (highly formal)

Common Types of Blazers:
- 2-button single-breasted (most versatile)
- 3-button single-breasted (ideal for tall men)
- 6-button double-breasted (synonymous with formal wear)

2 – Shoulders
When it comes to shoulders, Italian suit jackets are typically hand-made with a “rollino” technique. This involves inserting a thin padding, followed by another padding where the sleeve is attached, giving the shoulder a rounded and structured appearance.
In contrast, blazers are often tailored with shirt-shoulders, using a technique that pushes extra fabric under the shoulder, resulting in a softer, more natural look.
While jackets are meticulously manufactured, blazers are often tailored with a more casual, relaxed approach. Buy a tailored made suit from Silailor.
3 – Inside
Jacket interiors are typically designed using the interfacing technique, which extends from the roll line and shoulders to the bust to create a smooth, structured look. High-quality jackets also feature detailed interior lining and stitching.
In contrast, blazers are less formal and require less structure or padding. They are typically unlined and unpadded, with unstitched collars, making them light and comfortable to wear over multiple layers of clothing.
4 – Fit
Jackets are designed to fit slimmer and closer to the body, not meant to be worn with multiple layers. Blazers, on the other hand, have a looser fit and are less structured, especially at the shoulders.
5 – Fabrics
The jacket fabric needs to be sturdy and abrasion-resistant, since the trousers will be cut from the same material. The color, pattern, and details must be suitable for both business and ceremonial occasions. Jackets are often made with finer, higher-quality materials such as worsted wool, cashmere, linen, seersucker, and silk.
On the other hand, a blazer’s fabric can be chosen regardless of the trousers, and it can be less sturdy and come in different patterns. The most common fabrics for blazers include worsted wool, serge, cashmere, flannel, and fresco.
What to Pair With
To pair with a jacket, you’ll need trousers that match its colour and material, and formal shoes such as oxfords or brogues.
On the other hand, blazers can be paired with a wider variety of trousers, including chinos, khakis, or even bright-colored pants. The shoes to wear with a blazer depend on the trousers’ formality level: darker bluchers or double monk straps work well with gray flannels, and casual loafers or derbies pair well with chinos.
What Should You Wear?
When deciding what to wear, the occasion and desired look are important factors to consider. The jacket is the most formal and is typically worn for business, formal events, and black-tie occasions. The blazer is a step below in formality and can be worn for more casual events, but still requires a dressier appearance.
Conclusion
The jacket and blazer may look similar, but their differences are worth noting. While the jacket is the peak of formal menswear, the blazer offers more versatility and can be dressed up or down.
Whether you prefer a classic or modern look, a custom-made jacket or blazer from a reputable tailor can make all the difference. SILAILOR is one such tailor that offers affordable and high-quality custom-made jackets and blazers. Their attention to detail and commitment to customer satisfaction set them apart from the rest.
