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

https://www.bookmark-maker.win/in-my-twenty-years-of-fitting-bedrooms-i-ve-found-the-golden-rule-is-keeping

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