In fashion design, fashion modeling belongs to the category of three-dimensional composition. To put it simply, fashion design is a process of combining points, lines and surfaces organically to form a perfect shape by using the principle of formal beauty.

No matter how the style of clothing changes, its modeling elements are composed of points, lines and surfaces, and these elements have different properties, characteristics and functions. Understanding and mastering these modeling elements is the basic knowledge of learning fashion design.

Armhole arc is a very important part of clothing structure. After determining the armhole depth, chest width and the shoulder end points of the diagonal lines of the front and rear shoulders, the basic framework for drawing armhole arcs is established.

With this framework, several auxiliary points are needed: point B at the lower third of the chest width line and point B at the back half of the back width; And the cross where the chest line intersects the chest line and the back line, and the points D and D on the angular bisector.