Seams , garment edges panels ,yokes , collans ,etc.
Create the shape of the garment.This outline of the garment called silhouette is the most important shape.
Before noticing the fashion detail , seams,etc.of the garment it is the silhouette that is noticed .
Silhouette, an image or design in a single hue and tone, most usually the popular 18th- and 19th-century cut or painted profile portraits done in black on white or the reverse. Silhouette also is any outline or sharp shadow of an object
basic silhouette of the garment can be changed by raising on lowering the waisline , the hemline, the sleeve on widening on narrowing the falve , sleeves – fashion trends affect the silhouette first and them the details of the dress