The sideboard is the most mis-bought piece of storage furniture, because it looks like a simple box. Depth decides what fits inside, length decides whether the wall looks finished, and height decides whether the room feels open or divided.
Shop the pieces in this guide
Depth: choose by contents
| Depth | What actually fits | Where it works |
|---|---|---|
| 30–35 cm | Books, glasses, folded linen, small appliances; dinner plates only on their edge | Hallways, narrow living rooms |
| 40 cm | Dinner plates stacked (28–30 cm), serving dishes, 33 rpm records | Dining rooms — the standard for a reason |
| 45 cm | Large pots, board games, A4 folders upright | Kitchen or family storage |
| 50 cm+ | Bedding, towels, appliances; becomes a dresser rather than a sideboard | Bedrooms, laundry corners |
A dinner plate is 26–28 cm across, so a 30 cm deep cabinet needs plates stored on edge in a plate rack. If you want them stacked, you need 40 cm. This single measurement decides most sideboard purchases, and it is the one most often skipped.
Length: the two-thirds rule
For a sideboard standing alone on a wall, aim for 60–75% of the wall length. On a 200 cm wall that is 120–150 cm; on 250 cm it is 150–180 cm. Shorter than 50% and it looks like furniture waiting for the rest of its set.
| Wall length | Good sideboard length | Leaves |
|---|---|---|
| 150 cm | 90–110 cm | 20–30 cm each side |
| 200 cm | 120–150 cm | 25–40 cm each side |
| 250 cm | 150–180 cm | 35–50 cm each side |
| 300 cm+ | Two units, or one 180 cm plus open shelving | — |
Leave at least 15–20 cm between the cabinet end and a door frame or a corner; furniture pushed tight into a corner looks like it was forced in. If the wall is broken by a radiator, treat the radiator as part of the wall and measure around it.
Height: 80–85 cm is the sweet spot
At 80–85 cm the top is at comfortable standing height for serving, and at roughly the same height as a dining table, so it reads as a working surface rather than a wall. Above 95 cm a sideboard starts to act as a visual wall in an open-plan room; below 70 cm it becomes a media console and needs different proportions (see the TV stand guide).
Inside: shelf spacing and adjustment
| Contents | Clear gap |
|---|---|
| Dinner plates stacked | 12–15 cm per stack of 6 |
| Mugs, glasses | 12–15 cm |
| Bottles upright | 32–35 cm |
| A4 folders | 33 cm |
| Board games | 30–35 cm |
| Bedding, folded | 30 cm per stack |
Adjustable shelves matter more here than in a wardrobe, because sideboard contents change: plates in one season, games and linen the next. A fixed middle shelf at 30 cm is the most common design flaw in cheap cabinets — it fits nothing tall and wastes 15 cm above the plates.
Two more details worth checking: a cable cut-out at the back if a router or lamp lives on top, and a skirting notch at the base if your skirting board is over 8 cm tall — otherwise the cabinet stands 8 cm off the wall and everything falls down the gap.
Load and fixing: the tipping question
A 152 × 40 × 80 cm cabinet weighs 35–50 kg empty, and a full shelf of plates adds 15–20 kg. Most are rated to 20–25 kg per shelf. That is fine until someone leans on an open door.
- Anchor it if there are children in the house, or if the cabinet is taller than 90 cm.
- Load the bottom shelf heaviest — a top-heavy sideboard with all the plates up high is the classic tip-over.
- Soft-close doors and runners are not cosmetic: a slammed door is what walks a freestanding cabinet away from the wall over a year.
Style decisions that change the footprint
Legs versus plinth: legs add 10–15 cm of visible floor under the cabinet, which makes a small room feel bigger, but collects dust. A plinth sits flush and looks built-in. Cane or fluted fronts add texture without adding depth; gloss fronts in a bright room double the reflections and can look busy next to a window. Walnut and oak read warmer than white, and hide fingerprints better in a hallway.
Keep reading
Match depths across a room where you can — a 40 cm sideboard beside a 30 cm bookshelf reads as intentional, 40 beside 45 does not. More storage maths in the bookshelf guide, or browse the storage collection.
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