To get the perfect bedside table height, aim for your nightstand to sit roughly...

https://www.bookmark-zulu.win/for-the-best-bedroom-ergonomics-aim-for-your-bedside-table-to-sit-5-to-10-cm

To get the perfect bedside table height, aim for your nightstand to sit roughly 5 to 10 centimetres below the top of your mattress. This makes grabbing a glass of water or your phone effortless while you are in bed