For the perfect bedroom balance, your nightstand should sit level with the top...

https://fionafreshmaids.com/the-ultimate-guide-choosing-the-perfect-bedside-table-height-for-a-65-cm-mattress/

For the perfect bedroom balance, your nightstand should sit level with the top of your mattress or ideally 5-10 cm lower. Most standard UK beds pair well with tables between 55-70 cm high