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

https://www.livebinders.com/b/3703999?tabid=ab46b24e-973f-6425-f369-ea1068a28f75

To get your bedside table height just right, aim for the top of the nightstand to sit roughly 5 to 10 cm below your mattress surface. This creates a comfortable reach when you are in bed