The height of a nightstand in relation to the bed is a matter of personal preference and functionality. Here are some considerations to help you decide what might be the best height for your nightstand:
The top of the nightstand should generally be level with or slightly higher than the top of your mattress to ensure that items placed on it are easily accessible while you're lying in bed. If the nightstand is too low, you might have to reach down too far, which can be uncomfortable. If it's too high, you might have to reach up, which can also be uncomfortable.
Consider how you plan to use the nightstand. If you'll be placing a lamp, alarm clock, or other items that you need to see or use while lying down, the nightstand should be high enough to make these items easily visible and accessible.
The visual balance of the furniture in the room is also important. The nightstand should complement the bed and other furniture in terms of height and proportion. A nightstand that is significantly higher or lower than the bed might look out of place.
Typically, nightstands range in height from about 24 to 28 inches (61 to 71 centimeters). The standard height for a mattress is about 16 to 24 inches (40 to 61 centimeters), so a nightstand within the typical range should work well for most beds.
In summary, the nightstand should not be higher than the bed, but it should be high enough to be comfortable and functional. It's a good idea to measure the height of your mattress and choose a nightstand that is slightly higher or level with the mattress to ensure easy access to items while in bed.