To get your bedside table height just right, aim for the top of the surface to...

https://www.bookmarking-keys.win/aiming-for-the-perfect-bedside-table-height-is-all-about-comfort-the-ideal

To get your bedside table height just right, aim for the top of the surface to sit roughly 5-10 cm below your mattress-top. This makes reaching for your phone or a glass of water feel natural while you are in bed