examples of collars 
Collar: piece sewn onto a garment that finishes or adorns the neck.
Decoration made up of one or two pieces of fine soft pleated fabric; it is attached at the base of the neck and spreads out over the chest.
Collar that is square in back and has long lapels extending over the chest; it is fastened to a V-neck and, out of modesty, the plunging neckline is often concealed with a piece of fabric.
Collar made of a long strip of soft fabric sewn onto a round neck; it can be tied in front in various ways.
Wide turned-down collar with long rounded lapels that partially cross in front.
Peter Pan collar
Flat collar of uniform width with rounded tips; it is sewn onto a fairly open neck.
dog ear collar
Turned-down collar characterized by long, fairly wide points, which are rounded at the tips.
Collar whose fold covers the back of the neck; its lapels form a V where they cross on the chest.
Collar with rounded or tapered points that is sewn onto the neck and turned down along a fold line, which is higher in back than in front.