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How to wear a blazer casually

A blazer makes jeans and a T-shirt look put together in seconds. Here’s how to wear one without looking like you’re going to a meeting.

By Style Finder · Updated 26 October 2026

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In short

  • Choose an unstructured or relaxed blazer in navy, grey, camel or black.
  • Pair it with one casual piece: jeans, a T-shirt or trainers.
  • Push the sleeves up or wear it open for a relaxed look.
  • Leave the matching trousers at home.
On this page
  1. Five easy formulas
  2. Which blazers work
  3. Questions

Five easy formulas

  • Blazer, white T-shirt, dark jeans, white trainers.
  • Blazer, fine knit, chinos, loafers.
  • Blazer, hoodie, joggers, trainers (for a street-style twist).
  • Blazer, striped top, wide-leg jeans, flats.
  • Blazer over a slip dress with trainers or ankle boots.

Which blazers work

Unstructured blazers with soft shoulders, in cotton, linen, jersey or relaxed wool, are the easiest to wear casually. Oversized cuts work well with slim jeans; fitted ones with straight or wide trousers.

Questions

Yes: clean, minimal trainers are one of the easiest ways to make a blazer casual.

It usually looks like half a suit; a separate blazer in a different fabric works better.

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