one-size-fits-all
From Longman Dictionary of Contemporary Englishone-size-fits-allˌone-size-fits-ˈall adjective [only before noun] 1 a one-size-fits-all attitude, method, plan etc is designed to please everyone or be suitable for every situation, often with the result that it is not successful a one-size-fits-all public education program2 one-size-fits-all clothes are designed so that people of any size can wear themExamples from the Corpusone-size-fits-all• one-size-fits all dresses