For the best look and comfort, aim for your bedside table to sit between 55 and...

https://amumreviews.co.uk/should-bedside-tables-be-higher-than-the-bed/

For the best look and comfort, aim for your bedside table to sit between 55 and 70 centimetres high. A good rule of thumb is to keep the tabletop about 5 to 10 centimetres lower than the top of your mattress