A Marimekko chart packs two dimensions of data into a single view: how big each category is, and what makes up that category underneath. Most charts force a choice between the two. A Marimekko chart shows both at once.
That makes it useful anywhere a business needs to compare overall size and internal composition side by side, such as market share by brand alongside how each brand’s sales split across price tiers.
This article explains what a Marimekko chart is, walks through a worked example, and covers how to read one without misinterpreting the width and height.
What is a Marimekko chart?
A Marimekko chart, also called a mekko chart, is a type of bar chart where the width of each bar represents one dimension of data, such as a category’s overall size, while the height of the segments inside each bar shows the proportion of subcategories within it.
It shows absolute values through bar width and percentages through segment height in a single chart. The name comes from the Finnish textile company Marimekko, known for bold, geometric patterns that resemble the chart’s stacked, proportionally sized blocks.
How is a Marimekko chart different from a stacked bar chart?
A standard stacked bar chart usually keeps every bar the same width, showing only the internal breakdown of each category. A Marimekko chart varies the width of each bar to reflect the category’s overall size, adding a second dimension the standard format cannot show.
This distinction matters because a stacked bar chart alone can hide which category actually matters most in the bigger picture. A Marimekko chart forces both pieces of information into view together.
Marimekko chart example: Smartphone market
To see this chart in action, consider a simplified look at the global smartphone market, comparing three brands and how their sales split across price tiers.
| Brand | Market share | Budget | Mid-range | Premium |
|---|---|---|---|---|
| Apple | 40% | 0% | 20% | 80% |
| Samsung | 35% | 25% | 50% | 25% |
| Xiaomi | 25% | 70% | 25% | 5% |
In this kind of chart built from this data, bar width shows overall market size. Apple holds the largest share at 40 percent, followed by Samsung at 35 percent and Xiaomi at 25 percent. Segment height inside each bar shows the internal split. Almost all of Apple’s sales sit in the premium tier, while Xiaomi’s sales concentrate heavily in the budget tier.
Reading both dimensions together reveals something neither number alone would show: two brands can hold similar market share while pursuing completely different pricing strategies.
How do you interpret a Marimekko chart?
Interpreting a Marimekko chart means reading bar width and segment height as two separate but connected signals, then looking for patterns across both, a principle consistent with general data visualization guidance from the Nielsen Norman Group on making layered data easier to scan at a glance.
- Bar width shows a category’s proportional value relative to the total. A wider bar means a larger overall share.
- Segment height shows the composition within that category. A taller segment means a stronger contribution from that specific subcategory.
- Combined patterns reveal strategy. A wide bar dominated by one tall segment suggests a brand depends heavily on a single subcategory. A narrower bar with evenly distributed segments suggests a more balanced approach.
Consistently tall segments across multiple bars can point to a broader market trend, while a single dominant segment in one bar may signal that a brand is overexposed to one subcategory, which carries its own risk if that subcategory weakens.
When should you use a Marimekko chart?
The chart works best when you need to compare category size and internal composition at the same time, rather than one or the other.
Common use cases include:
- Comparing market share across competitors alongside their product mix, often pulled from a broader market research project.
- Analyzing campaign performance by channel and audience segment together.
- Reviewing employee diversity data by department and demographic breakdown.
- Evaluating regional sales alongside the product categories driving them within each region.
What are the limitations of a Marimekko chart?
A Marimekko chart becomes harder to read once it includes too many categories or subcategories, since narrow bars and thin segments get difficult to compare visually.
It also assumes the underlying data adds up cleanly to 100 percent within each bar, which does not always match messier real-world datasets without some preprocessing. For very large numbers of categories, a table or a simpler bar chart paired with a separate breakdown often communicates the same information more clearly.
How does a Marimekko chart fit with other analysis tools?
A Marimekko chart works well alongside cross-tabulation and pivot table analysis, since all three techniques break data down by more than one variable at once. Where a pivot table shows the same information in numeric form, the chart makes the relative scale visually obvious at a glance, which helps in stakeholder presentations where a table of numbers would take longer to explain.
Platforms with built-in advanced analytics and BI tools can generate a Marimekko chart directly from survey or market data without exporting to a separate charting tool, which keeps the analysis and the visualization in one place.
Frequently Asked Questions (FAQs)
Not directly. A Marimekko chart is built for exactly two dimensions, category size through width and composition through height. Adding a third dimension usually requires color coding or a separate supporting chart alongside it.
They are closely related. Both use variable-width, stacked segments to show two dimensions of data, and the terms are sometimes used interchangeably, though mosaic plots are more common in statistical contexts and Marimekko charts are more common in business reporting.
Spreadsheet software can build one with manual formatting, but purpose-built BI and survey analytics platforms generate them automatically from raw data, which saves significant time compared to manual chart construction.
Most Marimekko charts stay readable with five to eight categories. Beyond that, narrow bars and thin internal segments become difficult to distinguish, and a supporting table often communicates the detail better.
Yes. Any scenario with two layered dimensions, such as campaign spend by channel and audience segment, or workforce headcount by department and tenure, can use the same format effectively.
