Ready-to-wear fashion, also known as prêt-à-porter, off-the-rack, or off-the-peg clothing, refers to garments sold in finished condition in standardized sizes, as distinct from made-to-measure or bespoke clothing tailored to a particular individual. Ready-to-wear clothing is pre-manufactured to standard sizes and sold in finished condition, and it differs from mass-market clothing found in high-street retailers. Ready-to-wear clothing is made in small production runs to guarantee uniqueness and quality, rather than mass-produced in factories. Designers produce ready-to-wear clothing in the fashion industry, intended to be worn without significant alteration because clothing made to standard sizes fits most people. They use standard patterns, factory equipment, and faster construction techniques to keep costs low, compared to a custom-sewn version of the same item. Ready-to-wear collections are often shown by designers during Fashion Weeks. Small alterations can be made to ensure a more precise, finished fit for the wearer. Ready-to-wear fashion is thought to have been available since the 19th century for men, while it was more like the early 20th century for women.