examples of collars 
Collar: piece sewn onto a garment that finishes or adorns the neck.
High-necked collar that is folded over; it is usually snug around the neck and does not fasten.
Turtleneck that is large enough to be draped over the head, making a kind of hood that frames the face.
Turned-down pointed collar fastened with a buttoned placket, which ends at mid-chest.
Collar made of a narrow strip of fabric that sticks up from a round neck; its edges meet in front but do not fasten.
Stand-up collar with rounded upper points that come together at the neck, forming a V.
Collar made of a strip of fabric of variable width and attached to the edge of a neckline or round neck.
Piece of delicate, pleated or gathered fabric that adorns the neck of a dress; its shape has varied greatly from one period to another.