A notched lapel (aka step lapel/collar) is the standard on single breasted suits, and is seen on almost all suit and sports jackets. It's simple design allows it to seamlessly transfer from business to social occasions. The size of the notch can vary depending on the fashion of the day. A small notch is often called a 'fishmouth'. Classification: Business, Business Casual.
The most classic and versatile of all the suit lapels.
Avoid jackets with large lapels.
Lapels are the folded flaps of cloth on the front of a jacket or coat and are most commonly found on formal clothing and suit jackets. Usually, they are formed by folding over the front edges of the jacket or coat and sewing them to the collar, an extra piece of fabric around the back of the neck.
The width of your lapel will draw the eye to either your shoulders or down the front of your torso.
Ensure when you are wearing your jacket that your lapels always lay flat against the chest.
When wearing a boutonnière (a flower in your buttonhole), this is typically a single flower or bud. This is attached either in the buttonhole or pinned to the left-hand lapel.
Membership, affiliation pins are also pinned to the left-hand lapel.