ready-to-wear
US /ˌred.i.təˈwer/
UK /ˌred.i.təˈwer/

1.
clothing that is mass-produced in standard sizes and sold in finished condition, as opposed to being custom-made
:
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The designer launched a new ready-to-wear collection for the spring season.
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Most people buy ready-to-wear clothes rather than having them custom-made.