For the best look and easy access, your nightstand should sit level with the...

https://www.bright-bookmarks.win/finding-the-perfect-bedside-table-height-is-all-about-comfort-aim-for-your

For the best look and easy access, your nightstand should sit level with the top of your mattress or up to 10 cm lower. Most beds work perfectly with tables between 55 and 70 cm high