“I'd like a jacket cut like a suit jacket, but not a suit, something I can wear to work.” The customer stood in front of the rack, pointing at a jacket with lapels and a double-breasted button front, but in a different color from its trousers. The stylist smiled and asked back: do you want a blazer, a sport coat or an office jacket? Those three names refer to three different garments, and understanding the differences between them is the quickest way to buy the right one. So what is the difference between a blazer and a jacket?
Quick answer
What is the difference between a blazer and a jacket? “Jacket” is the general word for a short coat, from leather jackets to bomber jackets. A blazer is a type of jacket with the structure of a suit jacket, usually solid-colored with metal buttons, worn separately with trousers in a different color. Most blazers are jackets, but not every jacket is a blazer.
Jacket: the broadest name
In English, a “jacket” is a coat that reaches the hip or ends shorter, with sleeves. Its list is long: leather jackets, bomber jackets, denim jackets, windbreakers, Harrington jackets and even the suit jacket. Say “suit jacket” and people mean the jacket of a suit. Say “jacket” on its own and the listener will take it as a casual coat unless the context says otherwise.
So the right question is not “blazer or jacket” but “where does the blazer sit within the jacket family”.
What is a blazer?
A blazer is a structured jacket worn separately, not with trousers in the same fabric. The common signs to recognize one:
- Solid color: classic navy, but also grey, black, beige and burgundy.
- Metal buttons: gold, silver or brass, more prominent than the horn buttons of a suit.
- Patch pockets: outer pockets sewn flat onto the body of the jacket, with no flap or welt, looking more relaxed.
- Light lining or unlined: many blazers drop the lining across the back for breathability.
- Moderate formality: higher than a casual jacket, lower than a suit.
A blazer is usually worn with a shirt and trousers or chinos, with or without a tie. It is the most versatile piece for moving from the office to the weekend.
The difference between a blazer and a jacket: four types in one table
| Type | Structure | Fabric | Buttons | Pockets | Formality |
|---|---|---|---|---|---|
| Suit jacket | Fully structured, padded shoulders | Plain wool, same fabric as the trousers | Horn or tone-on-tone buttons | Flap or welt pockets | High |
| Blazer | Medium structure, may be lighter | Wool, flannel, solid-colored cloth | Metal or horn | Patch or flap pockets | Medium to high |
| Sport coat | Light structure, comfortable | Tweed, checks, patterns, coarse wool | Horn, leather, wood | Patch or flap pockets | Medium |
| Casual jacket | Unstructured or very light | Leather, bomber, denim, technical fabrics | Zip, snap buttons | Hip pockets, zip pockets | Low |
How does a suit jacket differ from a blazer?
A suit jacket is the top half of a suit. It is made in the same fabric and color as the trousers so the two can be worn together. If you wear a suit jacket with trousers in a different color, it looks odd because the fabric and the sheen don't match. A blazer is the opposite: it is designed to be worn with trousers of a different material and color.
The structure differs too. A suit jacket usually has full structure, neatly padded shoulders and crisp lapels, because it has to look good with its matching trousers. A blazer can be softer, with a more natural shoulder, and is easier to wear all day.
Sport coat: the suit-style jacket for relaxed days
The sport coat (American English) or sports jacket (British English) is a cousin of the blazer, but it came about for leisure, hunting and sport. That is why its fabric is thicker and coarser: tweed, flannel, checks and stripes. The colors are usually brown, moss green and warm grey, with a lot of pattern. A sport coat suits the weekend and informal parties, while a plain blazer suits the office better.
A simple rule to tell them apart: if the jacket has a large pattern or a coarse fabric, it's a sport coat. If it is plain, navy and has metal buttons, it's a blazer.
What is a men's suit-style jacket called? What is a jacket in the style of a suit?
This is how Vietnamese speakers often ask when they want a jacket with the look of a suit jacket but not worn with matching trousers. The answer depends on which piece you want:
- A plain men's suit-style jacket with metal buttons: a blazer.
- A patterned, coarse-fabric men's suit-style jacket: a sport coat.
- A suit-style jacket that is soft and unstructured: an unstructured jacket, or a soft blazer, more comfortable and suited to a casual style.
- Any separate suit-style jacket: Vietnamese speakers usually call these simply an “odd jacket” or a “men's blazer”.
When shopping, just say “a navy men's blazer with metal buttons” or “an odd jacket in a check pattern” and the seller will understand at once.
Men's office jackets: what are the options?
If you need a coat for the office but don't want to wear a blazer, there are a few jackets that suit a workplace:
- Wool overcoat (topcoat), knee-length or shorter: the most formal, suits the cold season and is worn over a suit.
- Trench coat: a long, rain-resistant coat in beige or moss green.
- Harrington or a thin stand-collar jacket: neat, youthful, suits a relaxed office.
- Simple thin leather jacket: suits creative industries, but not banking or law.
- Wool cardigan: replaces a blazer when you want something softer.
The key is that an office jacket must be neat, in a muted color and fit across the shoulders. The article men's office jackets has more suggestions by season.
When to wear a blazer and when a jacket?
| Occasion | Wear | Pair with |
|---|---|---|
| Important meeting, meeting partners | Suit jacket or navy blazer | White shirt, tie, dress trousers |
| Everyday office | Blazer | Shirt, chinos or dress trousers |
| Weekend party, meeting friends | Sport coat or patterned blazer | Open-collar shirt, chinos |
| Outings, travel | Casual jacket | T-shirt, jeans |
| Cold weather, going to work | Overcoat over a suit or blazer | Waistcoat, scarf |
Common mistakes
- Wearing a suit jacket with jeans. Shiny wool and jeans don't go together. Use a blazer.
- Buying a blazer too big because “I'll wear it separately, so it should be loose”. A blazer still needs to fit across the shoulders.
- Mistaking a blazer for an ordinary jacket. Wearing a blazer as an outer jacket and then putting another coat over it ruins the shape.
- Using a sport coat for a big meeting. Large patterns and a coarse fabric lack formality.
- Fastening every button. On a single-breasted two-button blazer, fasten the top button and leave the bottom one open.
Tip from Mon Amie's master tailor
The quickest way to tell whether a garment is a blazer or a jacket is to look at the shoulder and the lapel. A blazer has a neatly structured shoulder line and crisp lapels, like a suit jacket. A casual jacket is usually unstructured, with soft shoulders and no distinct lapel. When having a separate blazer made, tell the master tailor what trousers you plan to wear with it. The same blazer made for office dress trousers differs from one made for weekend chinos. With bespoke tailoring, the master tailor advises one-to-one to choose the fabric, fit and details to suit each way of wearing it.
Frequently asked questions
What is a blazer?
A blazer is a structured jacket worn separately with trousers in a different color. The classic color is navy, with metal buttons and patch pockets. It is more formal than a casual jacket but more versatile than a suit jacket.
What is a men's suit-style jacket called?
If it is plain with metal buttons, it is called a blazer. If it has a pattern and a coarse fabric, it is a sport coat. Vietnamese speakers usually call these simply an “odd jacket”. You can read how to choose a men's blazer to choose correctly.
Which men's office jacket should I choose?
Choose a muted, neat jacket that fits across the shoulders, such as a short overcoat, a trench coat, a Harrington jacket or a wool cardigan. Avoid puffer jackets, sports jackets and leather jackets that are too edgy if your workplace is serious.
Is a men's suit-style jacket different from a blazer?
It's almost the same thing. “Suit-style jacket” is how Vietnamese speakers refer to a jacket with the look of a suit jacket that is worn separately, so in practice it is usually a blazer or a sport coat.
Closing thoughts
In short, a blazer is a structured type of jacket, a suit jacket is the jacket of a suit, a sport coat is a more relaxed blazer, and a casual jacket is all the other coats. Understand that order and you will buy the right jacket the first time. To see blazers in real photographs, visit the lookbook, or book a fitting to try a made-to-measure blazer at Mon Amie.