The notched lapel (American English), step lapel or step collar (British English) is sewn to the collar at an angle, creating a step effect. This is the standard on single breasted suits, and is used on nearly all suit jackets, blazers, and sports jackets. The notched lapel double-breasted jacket is a rare setting. The size of the notch can vary, and a small notch is called fishmouth. This was the first type of lapel to appear.
2.Peaked lapel
Peaked lapel
The peaked lapel (American English), double breasted style lapel or pointed lapel (British English), is the most formal, featuring on double-breasted jackets, all formal coats such as a tailcoat or morning coat, and also commonly with a dinner jacket (both single and double breasted). In the late 1920s and 1930s, the single breasted peaked lapel jacket was considered
a very stylish design. The feature was carried into day clothing by the increasing popularity of the peaked dinner jacket. The ability to properly cut peak lapels on a single-breasted suit is one of the most challenging tailoring tasks, even for very experienced tailors.
3.Shawl lapel
Shawl lapel
The shawl lapel, roll collar, or shawl collar is a continuous curve. Originally seen on the Victorian smoking jacket, it is now most common on the dinner jacket (tuxedo). This similarly began as informal eveningwear, and was then made in both more and less formal versions, depending on the situation in which it was to be used.
