Here's how it works:
* Small: Refers to size.
* Insignificant: Refers to lack of importance.
* Slight: Can refer to both small size and lack of importance.
For example:
* "The small room was barely big enough to fit a bed." (Refers to size)
* "The insignificant detail was easily overlooked." (Refers to importance)
* "The slight change in temperature was barely noticeable." (Can refer to both size and importance)