Quick answer
On a two-button suit, fasten the top button only. On a three-button, fasten the middle (and optionally the top). Always leave the bottom button undone, including on a waistcoat. Double-breasted jackets are kept buttoned when standing.
Key takeaways
- ✓Never fasten the bottom button.
- ✓Two-button: top only.
- ✓Unbutton when sitting.
- ✓Waistcoat: leave the bottom button undone.
The Rules
| Jacket | Fasten |
|---|---|
| Two-button | Top button only |
| Three-button | Middle button (top optional) |
| Double-breasted | Keep buttoned when standing |
| Waistcoat | All but the bottom button |
Why It Matters
Fastening the bottom button pulls the jacket and ruins the line. Unbuttoning when you sit also prevents creasing and strain.
See the Cuts in Person
Try single and double-breasted jackets at the studio. Suit Archive's studio is at 12 Lorong Bakar Batu #06-07, Singapore 348745, open Monday to Friday, 11am to 11pm, by appointment. Every complete 3-piece suit is $178. Book online or WhatsApp us at (65) 8979 1210.
Try it on before you buy. Book a Suit Archive fitting and walk out in a suit that fits.
Frequently asked questions
Which button do you leave undone?
The bottom button on a jacket or waistcoat.
Do I button my jacket when sitting?
No, unbutton it when you sit.
What about double-breasted?
Keep it buttoned when standing.
