This curve does not have to be circular in shape as this one, but any other shape. After arranging the segments along the curve, the next step is trimming and deleting of unnecessary curves in case of their overlapping. Thus, the result is usually nicer than when the segments are duplicated at a greater distance in order to avoid overlapping.
Wreath ornaments of this type are often used as frame borders, within which you can insert more complex ornaments, some text or design.