Sets how the jacket fastens at the front — single- or double-breasted, button count, and overall formality.
Front button layout
2 Button
LAPEL
The lapel frames the chest and collar. Shape affects formality: notch lapels are versatile, peak lapels are dressier, concave and low styles add character.
Lapel shape
Notch
BUTTONS
Buttons are a finishing detail. Horn and natural tones read classic; contrast colours add visual interest on plain cloth.