Try something on for size
Meaning
Test how something feels or fits before committing.
Usage
Used for tentative experimentation.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Tailoring metaphor for fitting clothes.
19th-century English retail vocabulary adopted figuratively.