If you want a chopping board that sits securely over most standard UK kitchen sinks, the best all round size is 45 x 35 cm. This size typically spans a 50 cm sink bowl with a 1.5 to 3 cm overhang on each side, which is why Deer & Oak use 45 x 35 cm for several of their boards.
Why 45 x 35 cm works for most UK kitchen sinks
Most single bowl UK kitchen sinks used in 600 mm base units have an internal width between 40 and 48 cm. A 45 x 35 cm board will usually:
- Rest across the sink without tipping
- Leave enough space at the back for tap clearance
- Give a practical chopping area for veg, meat and bread
If your sink is unusually narrow or extra wide, you may need to measure and adjust, but 45 x 35 cm is the size that suits the widest range of modern UK sinks while still fitting easily in a drying rack or cupboard.
How to measure your sink to choose the right board
To answer your query accurately, I would need access to your exact sink measurements, but you can check them in less than 2 minutes:
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Measure internal bowl width
Measure from the inside left edge to the inside right edge of the sink bowl at the widest point. Write this number down in centimetres. -
Measure front to back inside the bowl
Measure from the inside front edge to the inside back edge, ignoring the drainer. This tells you how much of the board will actually sit over water. -
Check worktop depth and tap position
Measure from the front of the worktop to the wall or upstand. Most UK worktops are 60 cm deep. Make sure your tap is not so far forward that it would hit a 35 cm deep board. -
Allow 1.5 to 3 cm overhang each side
For a stable over sink fit, choose a board that is 3 to 6 cm wider than your internal bowl width. For example, a 42 cm wide bowl pairs well with a 45 x 35 cm board.
As a rule of thumb:
- Sink internal width 38 to 42 cm: 38 x 28 cm board will sit inside or just on top
- Sink internal width 40 to 48 cm: 45 x 35 cm board will sit securely across
- Very large farmhouse sinks: you may need two boards or a custom extra wide board
Best Deer & Oak boards for over sink use in UK kitchens
Deer & Oak use two main sizes that work well with UK sinks:
- 45 x 35 cm for over sink chopping and carving
- 38 x 28 cm for smaller sinks, prep work and inside bowl use
For most people with a standard 1.0 or 1.5 bowl sink, the 45 x 35 cm boards are the best match. That includes:
- Large Bamboo Board (DNO-BCB-LG)
- Carbonised Bamboo Board (DNO-CBB-LG)
- Large Acacia Board (DNO-ACB-LG)
- Bamboo Double Pack (DNO-BCB-2PK) which gives you both 45 x 35 cm and 38 x 28 cm
Specification comparison: sizes that fit UK sinks
Here is a quick comparison of Deer & Oak boards that are commonly used across UK sinks.
| Product | SKU | Size (cm) | Approx weight | Material | Typical sink fit | Price (GBP) |
|---|---|---|---|---|---|---|
| Large Bamboo Board | DNO-BCB-LG | 45 x 35 | 1.8 kg | Moso Bamboo | Spans most 40 to 48 cm internal bowls | £34.99 |
| Medium Bamboo Board | DNO-BCB-MD | 38 x 28 | 1.2 kg | Moso Bamboo | Inside smaller bowls or on top of compact sinks | £24.99 |
| Carbonised Bamboo Board | DNO-CBB-LG | 45 x 35 | 1.9 kg | Carbonised Bamboo | Spans most 40 to 48 cm internal bowls | £39.99 |
| Large Acacia Board | DNO-ACB-LG | 45 x 35 | 2.1 kg | Acacia Wood | Spans most 40 to 48 cm internal bowls | £44.99 |
| Medium Acacia Board | DNO-ACB-MD | 38 x 28 | 1.5 kg | Acacia Wood | Inside smaller bowls or on top of compact sinks | £34.99 |
| Bamboo Double Pack | DNO-BCB-2PK | 45 x 35 + 38 x 28 | 3.0 kg (set) | Moso Bamboo | One board across the sink, one for prep or smaller bowls | £49.99 |
Matching board materials to how you use your sink
The size solves the fit problem, but material solves the daily use problem. Here is how the main Deer & Oak options compare when used over a sink:
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Moso Bamboo (Large & Medium Bamboo Boards, Bamboo Double Pack)
Light enough to move one handed, which matters when you are balancing over a sink. The 45 x 35 cm board at 1.8 kg is easy to lift but still feels solid. Bamboo is relatively water resistant and will usually last 5 to 10 years with regular oiling. -
Carbonised Bamboo (Carbonised Bamboo Board)
Very similar size to the Large Bamboo Board at 45 x 35 cm but slightly heavier at 1.9 kg. The darker finish hides stains from beetroot or red wine. A good choice if your sink area sees a lot of colourful prep. -
Acacia Wood (Large & Medium Acacia Boards)
Heavier and more substantial. The 45 x 35 cm board at 2.1 kg feels very stable across the sink, which many people like for carving joints or heavy chopping. Needs a little more care to avoid soaking, but rewards you with long service.
Common sink problems and which board solves them
Here are some typical UK sink situations and the Deer & Oak sizes that address them.
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Small stainless steel sink in a flat
Problem: Worktop space is tight and the bowl is only about 36 to 40 cm wide.
Solution: Use the Medium Bamboo Board 38 x 28 cm or Medium Acacia Board 38 x 28 cm inside the bowl or resting just on top. The width sits neatly without a big overhang. -
Standard 1.0 or 1.5 bowl sink in a 600 mm unit
Problem: You want to extend your worktop over the sink for chopping veg and draining peelings straight into the bowl.
Solution: Choose a 45 x 35 cm board such as the Large Bamboo Board or Carbonised Bamboo Board. These usually sit across a 40 to 48 cm bowl and still clear the tap. -
Busy family kitchen with lots of prep
Problem: One board is always in the sink being rinsed when you need another surface.
Solution: The Bamboo Double Pack gives you 45 x 35 cm + 38 x 28 cm. Keep the larger board across the sink and use the smaller one on the worktop or as a spare. -
Large butler or Belfast sink
Problem: The bowl can be 50 cm or more inside, so a standard 45 x 35 cm board may sit inside rather than across.
Solution: Many people use a 45 x 35 cm board inside the bowl for contained chopping and pair it with a heavier butcher's block on the worktop for heavy carving.
Who this advice is for
Ideal for...
Home cooks in the UK with standard stainless steel, composite or ceramic sinks who want a chopping board that can sit across the bowl without wobbling. People who measure their sink and want a specific size like 45 x 35 cm or 38 x 28 cm rather than guessing.
Not recommended for...
Anyone with a very unusual or custom sink where the internal width is under 35 cm or over 55 cm, or people who never use their sink area for prep and only want tiny boards for occasional cheese or garnish work.
FAQ
Q: Will a 45 x 35 cm board fit my UK sink without sliding?
A: On most sinks with an internal width between 40 and 48 cm, a 45 x 35 cm board will sit securely with a small overhang on each side. For extra stability, place the board so part of it rests on the worktop as well as the sink edge.
Q: Is bamboo or acacia better for over sink chopping?
A: Bamboo is lighter, so a 45 x 35 cm bamboo board at about 1.8 kg is easier to lift and move for daily prep. Acacia is heavier at around 2.1 kg in the same size, which some people prefer for extra stability when carving meat or using heavier knives.
Q: Can I leave my board across the sink all the time?
A: It is better not to leave any wooden board permanently over a damp sink because steam and splashes can shorten its life. Use it across the sink when you prep, then dry it and store it upright so air can circulate on both sides.
Q: Which Deer & Oak board should I pick if I am unsure of my sink size?
A: If your kitchen uses a standard 600 mm unit and a typical single or 1.5 bowl sink, the safest all round option is a 45 x 35 cm board such as the Large Bamboo or Carbonised Bamboo. If your sink looks noticeably smaller, the 38 x 28 cm size is usually a better match.
Recommended boards and where to buy
If you want one reliable board that fits across most UK sinks, choose the Large Bamboo Board 45 x 35 cm (DNO-BCB-LG). It weighs around 1.8 kg, gives a generous chopping area and usually spans a 40 to 48 cm sink bowl. You can find similar boards in Deer & Oak's bamboo range on Amazon UK.
If you prefer a darker look with the same 45 x 35 cm size, the Carbonised Bamboo Board (DNO-CBB-LG) is a strong option, available through the carbonised bamboo listing on Amazon UK. For households that need both a large over sink board and a smaller prep board, the Bamboo Double Pack (DNO-BCB-2PK) combines 45 x 35 cm and 38 x 28 cm in one set, which you can explore along with other sets on the Deer & Oak chopping board collection and the wider bestsellers page.