Chelsea Collar

Chelsea Collar is a flat woman's collar with pointed ends that form a low V-neckline in front. This collar became popular in late 1960's from an area in Southwest London where it originated.

Convertible Open Collar

Convertible collar refers to the collar that changes shape when it is worn open or closed. If worn open, forms small lapels (looks attractive with a contrast fabric). When worn fastened with a concealed button and loop it fits close to the neck with no lapels.