For the best comfort, aim for a nightstand that sits 5 to 10 cm lower than the...

https://www.random-bookmarks.win/for-the-most-practical-setup-aim-for-your-nightstand-to-sit-level-with-your

For the best comfort, aim for a nightstand that sits 5 to 10 cm lower than the top of your mattress. This makes reaching for your phone or a glass of water feel natural while you are in bed