There isn’t one bin liner code for every 45-litre Simplehuman bin. The correct bag depends on the shape and model of your bin. For example, Simplehuman specifies code N for its 45L slim pedal bin, code K for its 45L rectangular pedal bin, and code J for some 45L semi-round models. Check the liner-code marking under your bin lid before ordering.
45L Simplehuman bin liner compatibility table
| 45-litre bin style | Specified liner code | Check before buying |
|---|---|---|
| Slim pedal bin (for example, CW2044) | N | Confirm your bin is the slim model |
| Rectangular pedal bin | K | Confirm rectangular style and model |
| Semi-round pedal bin with liner rim (for example, CW2030) | J | Check the code printed under the lid |
| Semi-round sensor bin with liner pocket | J | Confirm the 45L variant |
These are examples from Simplehuman’s UK listings, not a complete compatibility catalogue. Similar-looking bins and newer revisions may differ. The code marked on your own bin or its model-specific manual should take priority.
Where do you find the liner code on a Simplehuman bin?
- Open the bin lid and look underneath it for a letter identifying the custom-fit liner.
- If no marking is visible, locate the model number on the bin or its packaging.
- Use Simplehuman’s official custom-fit liner finder to match the model to its code.
- Buy bags that explicitly mention that code rather than relying on “fits 45L bins”.
The manufacturer’s UK website says its liner ID tag is located under the lid. Looking there is usually quicker and more reliable than guessing from the bin’s capacity.
Why do two 45-litre Simplehuman bins need different bags?
Capacity measures how much waste the bin holds; it does not describe its shape. A tall, slim 45L bin has a different opening and interior profile from a wider rectangular or semi-round 45L bin.
Custom-fit bags are shaped to grip the rim and reach the bottom without excessive bunching. That is why a code N bag designed for a slim bin should not automatically be treated as a substitute for code J or K, even if the packs refer to the same litre capacity.
Can you use ordinary 45-litre bin bags instead?
Sometimes, yes. A general-purpose liner may work if its opening is wide enough to fold over the rim and its length is sufficient for the bin. But a bag labelled 45L is not guaranteed to fit a particular 45L Simplehuman bin. It might slip down, be too narrow at the opening or leave an awkward amount of material hanging outside.
When buying non-branded liners, measure the width and depth of a rectangular opening—or the circumference of a round or semi-round opening—along with the required bag length. Check the supplier’s bag measurements rather than matching the litre number alone.
What does Simplehuman code J, K or N mean?
These letters identify different custom-fit liner shapes in Simplehuman’s product range; they are not universal bin-bag size standards. Code J bags are listed for certain semi-round 45L bins, code K for the 45L rectangular pedal bin, and code N for the 45L slim pedal bin. Other bins use other codes.
Where can you buy compatible liners?
You can compare options for Simplehuman code J liners, code K liners and code N liners on Amazon UK. Before checkout, verify the code on the product listing and your bin. These are general Amazon search links, not preselected or tested product endorsements.
Frequently asked questions about which bin bags fit a 45 litre simplehuman bin
Do all 45L Simplehuman bins use code J?
No. Code J fits certain 45L semi-round designs, but some other 45L bins use codes K or N.
What bin bags fit the 45L Simplehuman slim pedal bin?
Simplehuman specifies code N for its 45L slim pedal bin, including the model listed as CW2044. Confirm that yours is the same style.
What bin bags fit the 45L Simplehuman rectangular pedal bin?
The official liner finder lists code K for the 45L rectangular pedal bin. Check the model and code marking before purchasing.
How do I tell whether my bin is slim, semi-round or rectangular?
Look down at the bin’s opening from above. A slim bin is narrow relative to its depth; a rectangular model has a broad, straight-sided opening; a semi-round bin has a curved front. Shape helps narrow down the model, but the liner code is the definitive check.
Bottom line
For a 45L Simplehuman bin, check the letter under its lid—not just the capacity. Depending on the model, the right custom-fit bag may be J, K or N. Matching that code is the simplest way to avoid buying the wrong liners.
Sources
- Simplehuman UK: Custom-fit liners and code finder
- Simplehuman UK: 45L slim pedal bin (code N)
- Simplehuman UK: 45L semi-round pedal bin (code J)
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