Blue lengthwise lines for separates offer a directional idea in this photograph. The shoulder areas project slightly, while a pale narrow line runs between darker surfaces. The skirt widens below the waist and carries more points of light. The reference shows a long continuous silhouette. For separate pieces, the direction of the pale lines is especially useful; you can choose your own length independently.
For your own separate pieces, borrow the upper focus. Compare a decorated top with a quieter skirt and then with trousers. Notice where the lengthwise line finishes at the waistband and whether you want a definite interruption there. A belt would add another horizontal line, so try the arrangement without one first.
If you plan to wear a jacket, assess the defined shoulders with it. The outer garment may hide exactly the focus you selected. Material and decorative technique cannot be established securely from the picture. Visible direction, shoulder shape and the distribution of pale areas are sufficient for this comparison; test the actual fit of your separate pieces yourself.