try on for size verb4 •To test an item of clothing by wearing it, to determine if it is the correct size. •(figurative) To test something for suitability. •(figurative) To ponder or consider an idea."Cool. So obviously that's your outfit's kinda thing, but try this on for size on top of it: I did not forget. I still haven't." — 2023 •(figurative) To receive an imminent attack.Mona: Try this vampire bolt on for size! — 1999 formstried on for size · trying on for size · tries on for size