| Clue | Source | Date |
|---|---|---|
| Approximately 39 inches | Universal | 04 Jun 2023 |
| Approximately 39 inches | New York Times | 10 Jun 2020 |
| It's defined as the distance light travels in 1/299,792,458 second | Wall Street Journal | 21 Sep 2017 |
| Bath unit? | ||
| Bath unit? | ||
| About 39.37 inches | ||
| 39.37 inches | ||
| Side of a stere | ||
| 39.37 inches |