Haute Couture, or "high fashion" in French, is a type of fashion design that is custom-made for individual clients with the highest level of craftsmanship and attention to detail. Haute Couture garments are made from the highest quality materials and are tailored to fit each individual client's measurements perfectly. Due to the labor-intensive and highly specialized nature of Haute Couture, only a select few fashion houses are able to produce it, and the cost of a Haute Couture garment can range from tens to hundreds of thousands of dollars.

On the other hand, Ready-to-Wear, or "off-the-rack" fashion, is mass-produced clothing that is designed to fit a broad range of body types and sizes. Ready-to-Wear is produced in large quantities and is sold in stores at a much lower price point than Haute Couture. While the design of Ready-to-Wear may not be as intricate or personalized as Haute Couture, it is still crafted with high-quality materials and is often designed by well-known fashion designers.

In conclusion, the main difference between Haute Couture and Ready-to-Wear is the level of customization and exclusivity. Haute Couture is made-to-measure for individual clients with an emphasis on exceptional craftsmanship, while Ready-to-Wear is mass-produced for a wider audience at a more affordable price point. While both types of fashion design have their own unique benefits and appeal, they are distinct from one another and cater to different types of customers.