The "reveal the inches" metaphor is often used to convey the idea of gradually uncovering or disclosing small, incremental details or aspects of something, typically leading to a better understanding or appreciation of the whole picture. It implies a process of unveiling or unraveling, bit by bit, to gain deeper insight or clarity.
The mayor plans to reveal the inches of his 5 year plan at the next townhall meeting
The day that all people (in marching band) look forward to at the beginning of a new season, where the music and movements you will be working on repeatedly for the next few months are revealed.
Guy 1: Man, tomorrow is the marching band show reveal day, aren't you excited?
Guy 2: Of course I am, I bet it will be awesome.