Short answer: a king bed wants nightstands 45–60 cm wide, with the top surface within 5 cm of the mattress — which for most mattresses means 55–60 cm high. The old rule of thumb was "table top level with the mattress", but that was written when mattresses were 20 cm thick. Modern mattresses plus a 25 cm base put the sleeping surface at 55–60 cm, and the nightstand has to follow.

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King beds expose bad nightstands the way a spotlight exposes bad dancing. A 30 cm table beside a 193 cm bed looks like a drinks coaster that got ambitious, and the proportion problem is worse than the functional one — you will notice it every single morning.
Width and height by bed size
| Bed width | Nightstand width | Top height | Notes |
|---|---|---|---|
| 90 cm single | 30–40 cm | 50–55 cm | One is enough |
| 140 cm double | 35–45 cm | 52–58 cm | Two if the wall allows |
| 160 cm wide double | 40–55 cm | 55 cm+ | The common sweet spot |
| 180 cm super king | 45–60 cm | 55–60 cm | Below 45 cm looks under-scaled |
| 193 cm king (US) | 50–60 cm | 58–62 cm | Or 45 cm if the wall is tight |
The proportion rule behind the numbers: nightstand width should be roughly 25–30% of the bed width. On a 193 cm king that is 48–58 cm. Go under 25% and the table looks like an afterthought; over 35% and it starts competing with the bed rather than serving it.
The 5 cm height rule, and why
Within 5 cm of the mattress top, either way. Higher than that and reaching for a glass at 3 am involves lifting your shoulder off the mattress, which wakes you up properly. Lower and you are groping in the dark for a surface your hand expects to be higher.
If you cannot hit the band, err on the high side. A nightstand 8 cm too tall is annoying; one 8 cm too short means the lamp throws light across the bed rather than onto your book, and the glass gets knocked over by the duvet instead of the hand.
The 60 cm walkway constraint
Two nightstands on a king bed is a wall-length commitment. Take the bed frame width (usually mattress + 8–12 cm), add two nightstands, add two 60 cm walkways, and you get the wall you need.
- 160 cm bed: 170 + 2×45 + 60 = 320 cm minimum wall
- 180 cm bed: 190 + 2×50 + 60 = 350 cm
- 193 cm bed: 205 + 2×55 + 60 = 375 cm
Most bedrooms are 330–380 cm on the wall the bed goes against, which is why so many king beds end up with one nightstand and one wall shelf. That is a perfectly good outcome — a 40 cm floating shelf at mattress height costs €25 and does 90% of the job.
Depth: the number that blocks doors
Nightstand depth runs 30–45 cm. Under 35 cm is fine for a lamp, a phone and a book. Over 40 cm and it starts to intrude on the walkway at the foot of the bed, particularly in rooms under 320 cm deep. Measure the gap between the bed's head wall and the nearest door swing before choosing a 45 cm deep model — a wardrobe door at 60 cm of swing plus a 45 cm nightstand is a collision waiting for a Tuesday morning.
Drawers versus open shelves
Three shallow drawers (12–15 cm each) hold more usefully than one deep drawer, because bedside clutter is small: chargers, glasses, tablets, a paperback, four pens you will never use. A 40 × 35 cm footprint with three drawers is the most efficient shape in the category. Open shelves look lighter in small rooms but collect dust and visible clutter at a rate that surprises people who have never owned one.
Matching, or deliberately not
Matched pairs are safer and slightly boring. Two different nightstands at the same height and similar weight work well and cost less, because you are not paying for a set. The rule if you mix: match the height exactly, let the width differ by up to 10 cm, and keep both in the same wood family. Nobody notices a mismatched pair that agrees on height. Everybody notices a matched pair that disagrees by 6 cm.
Keep reading
More dimension guides are in the collection, and the full index is on the furnolio journal.
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