After twenty years of fitting bedrooms, I’ve learned that ergonomics matter....

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

After twenty years of fitting bedrooms, I’ve learned that ergonomics matter. Your bedside table should ideally sit 5-10 cm below the top of your mattress. This makes grabbing a glass of water or your phone feel natural rather than a reach