Ready-to-wear or prêt-à-porter (pʁɛ.ta pɔʁ.te; often abbreviated RTW; "off-the-rack" or "off-the-peg" in casual use) is the term for factory-made clothing

Clothing

Clothing refers to any covering for the human body that is worn. The wearing of clothing is exclusively a human characteristic and is a feature of nearly all human societies...

, sold in finished condition, in standardized sizes, as distinct from made to measure

Made to measure

Made to measure typically refers to clothing that is sewn from a standard-sized base pattern. A tailored suit is a common example of a made-to-measure garment...

 or bespoke

Bespoke

Bespoke is a term employed in a variety of applications to mean an item custom-made to the buyer's specification...

 clothing tailored to a particular person's frame. Off-the-peg is sometimes used for items which are not clothing.

Ready-to-wear has rather different connotations in the spheres of fashion

Fashion

Fashion, a general term for a currently popular style or practice, especially in clothing, foot wear, or accessories. Fashion references to anything that is the current trend in look and dress up of a person...

 and classic clothing.