How to size a nightstand: height, depth, and what fits on top
Search for nightstand dimensions and you will be told the standard height is somewhere between 24 and 28 inches. That range is what furniture shops happen to stock, quoted back at you as a rule. A bedside cabinet has no industry grid the way a kitchen does, because the thing that sets its height is standing right next to it. Size one from your own bed instead, and decide the awkward parts before it is built. Inches first, millimetres in brackets.
The top of a nightstand wants to land level with the top of your mattress, give or take a couple of inches. Mattress heights vary wildly, since a low platform bed and a tall divan with a thick topper can differ by a foot, so that relationship produces very different numbers in different bedrooms. It is why a nightstand bought off a shelf so often feels wrong. Depth follows the bed rather than the wall: match the bed or stay shallower, so nothing sticks out into the walkway. Width is whatever the gap allows, and the only test that matters is whether a lamp, a glass and a book fit on it at once.
Height: the one rule that replaces the number
You use a nightstand lying down, half asleep, in the dark, mostly by feel. Everything about the height follows from that.
If the surface sits below the mattress, you reach down over the edge and put a glass of water somewhere you cannot see, which is how glasses of water end up on floors. If it sits well above the mattress, you are reaching up and over a lip, and anything you take from it comes towards you at chest height while you are lying flat. Level means your hand travels sideways along a continuous plane.
So measure the mattress, made up, exactly as you sleep on it, topper included, because a 3" topper is 3" of nightstand height. Then build the top to that. For the range most beds produce: a low platform bed often lands a nightstand around 20" (510 mm), an ordinary bed somewhere near 24–26" (610–660 mm), and a tall bed with a deep mattress can want 30" (760 mm) or more. Those are consequences rather than targets. The target is the mattress.
One exception: if there is a headboard or a wall-mounted light, check the nightstand top clears whatever is behind it before you settle the height. Losing an inch now is easier than finding the lamp does not stand up later.
Depth: measured from the bed, not the wall
The instinct is to fill the wall. Resist it. In a bedroom, the walkway beside the bed is usually the tightest space in the room, and a nightstand deeper than the bed is the piece of furniture you will collide with in the dark for the next ten years.
Match the bed's depth at that point, or come in shallower. If your bed sits on a frame that is shallower than the mattress, work from whichever projects further. Fifteen to eighteen inches (380–460 mm) covers most bedside cabinets comfortably, and a small bedroom is well served by 12" (305 mm), the same depth as a kitchen wall cabinet, which holds far more than people expect.
Depth buys you drawer capacity, and that calculation is worth doing explicitly. A drawer loses length to the runners and to the gap behind it, so a 15" deep cabinet gives you a drawer of maybe 12" inside. That suits what lives in a bedside drawer: a charger, a book, a blister pack, a pair of glasses. It does not suit folded clothes, and a nightstand is a poor place to store them anyway.
Width: the surface test
Width is set by the gap between the bed and whatever is on the other side, whether a wall, a wardrobe or a door swing. Leave at least 2" (50 mm) between the nightstand and the bed frame so bedding can hang and you can make the bed without moving furniture.
Within whatever that leaves, the meaningful test is what has to sit on top at the same time. Put the actual objects on a table and measure the footprint: a lamp with a shade wider than its base, a glass, a phone, a book, and whatever else lives there. Most people need somewhere around 16–20" (400–500 mm) of width, and a lamp base is usually what decides it.
If the wall is generous, a wider, lower cabinet beats a narrow tall one: more surface, more drawer, and it does not read as a tower next to the bed. If the wall is tight, consider a wall-hung cabinet with no legs. The floor stays clear, which makes a small bedroom feel larger and a vacuum cleaner much happier. Hanging it needs a rail or a full-thickness back; see back panels for what that means.
Inside: drawer, door, or open shelf
All three suit different people, and the differences are small enough to choose on taste, with two exceptions worth flagging.
A drawer is the default for good reason. It hides the small ugly things, cables, medication, earplugs, and it brings the back of the cabinet out to you rather than making you reach in. Fit it with soft-close runners, since a bedside drawer is the one drawer in the house that gets opened in the middle of the night next to a sleeping person.
A door gives you one taller space instead of two shallow ones, which suits a stack of books or a CPAP machine. Soft-close hinges apply for the same reason, and on a cabinet this small the door is light enough that two hinges are plenty.
An open shelf is the cheapest and the most honest about what a nightstand holds. It also displays everything you put in it, permanently, which is either the point or the problem.
Most people converge on a drawer over an open shelf: the drawer takes what should not be seen, the shelf takes the book you are currently reading, and neither needs opening in the dark.
Plan the cable before it is built
This detail separates a bedside cabinet designed for a bedroom from a small cupboard placed in one. Something on that surface needs power, a lamp, a phone or a clock, and the cable has to get from the socket behind the furniture to the top of it.
Decide which of these you want while it is still a drawing:
A notch in the back panel, low down, so the cable passes behind the cabinet and comes up inside it. Invisible, and it lets the cabinet sit flat against the wall.
An open back, which solves it completely and is a legitimate construction as long as the box is braced. Rear braces exist for exactly this.
A grommet in the top or in a shelf, if you want a charger living inside the drawer with the phone plugged in through the surface.
All three are trivial to build in and awkward to add afterwards. A hole cut later is a hole cut later, and it looks it.
The five-minute version
Step 1. Measure your mattress
Floor to the top of the mattress, made up, with the topper on if you use one. This is the only number that matters, and nobody publishes it
Step 2. Set the top surface
Level with the mattress top, or within about 2" either way. Level is the safest default and the easiest to reach lying down
Step 3. Check the clearance
Leave at least 2" between the nightstand and the bed frame so bedding does not jam and you can make the bed
Step 4. Set the depth from the bed, not the wall
Match the bed's depth at that point or stay shallower. A nightstand that projects past the mattress into the walkway is the one you hit in the dark
Step 5. Decide where the cable goes
Before it is built. A notch in the back or a hole in the top is a design decision; a hole drilled later is damage
A last note on pairs. Two nightstands flanking a bed do not have to be identical, but they do have to agree on the top height. That is the line the eye reads across the bed, and a mismatch there is what looks wrong in photographs. Different widths, different contents, same height.
Build it to your mattress, not to a catalogue
A nightstand is the easiest case for made-to-measure: one small cabinet, one dimension that matters, and a number nobody but you can know. Type the height your bed asks for, choose a drawer or a door, and the parts, the hardware and the price come out the other side.
Level with the top of your mattress, or within about two inches of it either way. No standard height is worth following, because there is no standard mattress height: a low platform bed and a tall divan with a topper can differ by a foot, and the figures quoted online, usually 24 to 28 inches, are the range furniture shops happen to stock rather than a rule. Measure your bed made up, exactly as you sleep on it, and build the top to that line. In practice that produces roughly 20 inches for a low platform bed, 24 to 26 for an ordinary one, and 30 or more for a tall bed with a deep mattress.
How deep should a nightstand be?
No deeper than the bed beside it. The walkway next to a bed is usually the tightest space in a bedroom, and a nightstand that projects past the mattress is the one you walk into in the dark. Fifteen to eighteen inches (380–460 mm) suits most bedrooms, and twelve inches (305 mm) works in a small one, the same depth as a kitchen wall cabinet and roomier than people expect. Remember that a drawer is shorter than the cabinet by the runner clearance and the gap behind it, so a 15 inch cabinet gives you about 12 inches of drawer.
How wide should a nightstand be?
Whatever the gap allows, minus at least two inches of clearance from the bed frame so bedding can hang and you can make the bed. Beyond that the useful test is the surface: put the lamp, the glass, the phone and the book on a table and measure what they occupy together. Most people land somewhere around 16 to 20 inches of width, and the lamp base usually decides it. Where the wall allows, a wider and lower cabinet beats a narrow tall one, since it gives more surface and more drawer and does not read as a tower next to the bed.
Should a nightstand be higher or lower than the bed?
Level is the safest default, and if you must choose, slightly higher usually beats lower. You use a nightstand lying down and mostly by feel: when the surface is level with the mattress your hand travels sideways along a continuous plane, whereas a surface below the mattress means putting a glass of water down over an edge you cannot see. Much higher than the mattress brings its own problem, since anything you take from it arrives at chest height while you are lying flat.
Do two nightstands have to match?
They have to agree on the height of the top; everything else is free. The top surfaces form a line the eye reads straight across the bed, and a mismatch there is what looks wrong in photographs even when nobody can say why. Different widths, different internal arrangements, even different constructions are all fine. A drawer unit on one side and an open shelf on the other makes a perfectly good pair as long as the tops line up.
Is a wall-mounted nightstand a good idea?
In a small bedroom, often the best idea available. Taking the legs away leaves the floor clear, which makes the room feel larger and makes cleaning under it possible instead of theoretical, and it lets you set the height exactly where the mattress asks without a plinth in the way. The requirement is a proper fixing: a wall-hung cabinet needs a hanging rail or a full-thickness back to carry it into the studs, never a thin back panel, and the wall behind has to be something worth screwing into.
How do I hide the lamp and charger cables?
Decide before it is built, because all the good answers are design choices and the bad one is a hole drilled afterwards. A notch cut low in the back panel lets a cable pass behind the cabinet and come up inside it while the cabinet still sits flat to the wall. An open back, braced rather than empty, solves it entirely and is a normal construction. A grommet in the top or in a shelf suits a charger that lives in the drawer with the phone plugged through the surface. Any of the three is trivial while the cabinet is a drawing.
