|A.N. Wilson: Young Fogey |
Only shawl or peaked lapels are used for dinner clothes. Peaked derives its heritage from the tailcoat, shawl from the smoking jacket. The shawl lapel produces a softer, old-world image and tends to be used on alternative dinner jackets such as the white summer dinner jacket, velvet smoking coat, or more idiosyncratic ones in wool tartan or cotton madras. Men with round faces or less muscular physiques generally look smarter in the uplifting, sharper-angled, pointed-end peaked lapel. Both lapels possess the sweep and self-importance that helps differentiate the black-tie coat from the less formal suit jacket.
Style and the Man, Alan Flusser (1996)