| Clue | Source | Date |
|---|---|---|
| Rulers, for instance | Newsday | 21 Jul 2021 |
| Some have centimeter marks | The Washington Post | 28 Nov 2016 |
| Ones making the rules? | New York Times | 21 Oct 2016 |
| Ones making the rules? | ||
| Standards for comparison (and the first place to find Suri in this puzzle!) | ||
| Rulers and such |