The golden rule for bedside tables is comfort. Aim for your table to sit about...

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

The golden rule for bedside tables is comfort. Aim for your table to sit about 5-10 cm below the top of your mattress. This makes reaching for your phone or a glass of water effortless while you are in bed