Decide where you will actually wear it
Write down the next two occasions you want a blazer for, and check their dress requirements.
- For varied everyday use: start by trying a two-button single-breasted blazer. This is also Articles of Style’s versatility recommendation.
- For a look you already prefer: include double-breasted in your first fitting. Buying single-breasted first is a useful default, not a qualification you must earn.
- For an occasion that specifies a suit: settle that requirement before choosing buttons. Read how a blazer differs from a suit jacket if the garment category is still unclear.
The decision here is which standalone blazer suits your use. More buttons alone cannot resolve a dress code.
Check the overlap, then try the fastening
A single-breasted front overlaps narrowly; double-breasted wraps farther across the body and displays two button columns. “Single” does not mean the edges merely touch. Martin Fisher Tailors explains the construction.
In the illustration, the notch lapel has an indentation where it meets the collar; the peak lapel points upward. These are lapel shapes, not the definition of the closure. Rampley & Co illustrates the distinction.
6x2 means six exterior buttons, two able to fasten, not an instruction to close both. Bond Suits describes both upper-button-only and both-button fastening. Ask the seller to demonstrate the intended closure; on a double-breasted jacket, fasten its inside anchor button too when assessing the closed front. It supports the inner panel, as Articles of Style explains.
For a conventional two-button single-breasted jacket, leave the lower button undone when checking the fastened fit. See the buttoning guide.
Compare the fit, without a body-type rule
Do not rule out double-breasted on height or build alone. Rampley & Co’s fit discussion explicitly includes a broad range of bodies.
Try both over the shirt or knit you expect to wear. With your arms relaxed, inspect three places:
- Collar: check for a gap behind the neck. Articles of Style’s fitting guide calls for contact with the shirt collar.
- Chest: look for lapels forced outward.
- Waist: look for lines pulling out from the button.
The last two are signs of tightness identified by Proper Cloth. Try another size or cut instead of keeping a tight jacket open to conceal the problem.
Then sit, reach forward and stand again. Compare comfort as well as the mirror view. These checks are a shopping routine, not a remote fitting diagnosis.
Choose the one that works with your own clothes
The illustration offers outfit ideas, not a rule reserving double-breasted for formal events. Put each shortlisted jacket beside trousers you already own, then try a complete outfit.
- Choose single-breasted if you prefer it both open and fastened and can name ordinary occasions for it.
- Choose double-breasted if you prefer the wrapped front, it fits comfortably and you have an outfit ready for it.
- Keep looking if either choice depends on ignoring pulling or buying several other pieces just to make it work.
If you expect to wear double-breasted open, check that exact jacket open too. Rampley & Co allows this with suitable fit and also distinguishes seasonal cloth choice from closure style. Compare the fabric and construction of the actual candidates; neither button layout defines a summer or winter jacket.
Use those results to narrow the single- and double-breasted blazer options. There is no need to buy both.
Sources
- Martin Fisher Tailors: overlap and button columns
- Bond Suits: double-breasted button configurations
- Articles of Style: double-breasted fit
- Proper Cloth: signs of fit problems
How this guide was built
AI wrote this guide for Chexlow, using published explanations from tailors, clothing makers and specialist menswear writers. The sources support the closure and fit details; the occasion and outfit checks are editorial guidance for choosing a first blazer, not findings from product testing.
Edited by the Chexlow team · Images are AI-generated illustrations