Silhouette:

The basic shape and outline of the garment, which defines its style and fit. It can be a dress, blouse, pants, jacket, etc.

Neckline:

The design of the garment’s neckline, which can vary widely, including styles like crew, V-neck, scoop, or collar details.

Sleeve Style:

Details about the sleeve length and shape, such as short, long, puffed, or sleeveless. This also includes any special details like cuffs or pleats.

Seam Placement:

The location and type of seams used in the garment, such as side seams, princess seams, or back seams. The illustration may also highlight topstitching or decorative seam details.

Pockets:

The type, size, and placement of pockets—whether they are patch pockets, welt pockets, side pockets, etc.

Cuffs/Collars:

If the garment includes a cuff or collar, its shape and design are shown, which can be a classic shirt cuff, button-down collar, or a turtleneck.

Hem:

The bottom edge of the garment, whether it’s a straight hem, curved hem, or any special finish like a rolled hem or frayed edge.

Fabric/Texture:

Though a flat sketch is usually done in a simplified form, the fabric used for the garment might be illustrated through textural lines or swatches to indicate how it will look.

Details:

Any unique design elements, such as embroidery, appliqué, ruffles, or trims that add to the garment’s aesthetic.