Fashion designers apply the elements and principles of design to create harmonious designs. Haute couture and prêt-a-porter designs adhere to the same principles of design but cater to different audiences.
Visit a high-end apparel store and look for the most expensive men's shirt. Read the fabric description; feel the garment for quality and texture; see the finishing, the way the buttons are attached, the collar and the cuff finishing. Turn the shirt inside out and see the finishing; count the number of stitches per square inch. Then, visit a mass market store and carry out the same activity.
Alternatively, you may visit the websites of a luxury apparel brand and a mass market brand. Do online research about the fabric used in each shirt. Here too, see the finishing, the way the buttons are attached, the collar and the cuff finishing.
Write a report comparing the two shirts, keeping in mind the elements and principles of design.