Made and measured – the ball at the centre of the action 

Right now, billions of people are watching the World Cup. They’re watching the passes, the tackles, the goals, and the arguments about whether goals should count. But I guess very few of us are thinking about the object at the centre of all of it. 

The ball. 

I’ve spent time looking into what it actually takes to make a football that gets used on the World stage – how it’s made, tested, what it has to prove, and what’s changed over the years. Some of it connects very directly to the kind of work we do at Hexagon every day. And that makes it all the more interesting. 

Here are the five things that stood out most about ball measurement. 

1. Performance from kick-off to final whistle 

Think about those heavy leather balls from the 1960s. The ones you see in grainy old footage, flying through muddy winter pitches. As a match went on and the rain came down, those balls would get heavier. The way they bounced would change. The way they flew through the air would change. The physical effort required from a player to pass the length of the pitch would change. 

All of those variables would be fundamentally unfair. The game has to be the same for both teams, in every minute, in every weather condition. The quality inspection process exists to guarantee that the ball performs the same in the 90th minute as it does at kick-off. 

Two tests in particular make this point sharply. The ball is blasted against a steel plate more than 2,000 times in a row – simulating sustained match play far beyond anything you’d encounter on a real pitch, and it must still retain its original shape and pressure. It is also soaked in water and weighed. It cannot gain more than 10% of its own weight through water absorption. 

These aren’t gentle quality checks. The measurement regime is designed to push the ball far beyond what it will ever actually face because if it can survive the lab, 90 minutes is relatively straightforward. 

The philosophy behind FIFA’s testing programme is something we recognise immediately. You design the test to be harder than reality, because that’s the only way to be confident about what happens in reality. In manufacturing, that means simulating years of operational stress in a controlled environment. The goal is always to find the failure mode in the lab, not on the pitch – or on the production line, or in the field. What’s changed is how precisely we can now measure what’s happening during those tests, which means the pass/fail threshold can get tighter and tighter over time.

2. It has to be almost perfectly round  

A football must be almost perfectly spherical. That sounds obvious, but the precision required to prove it is anything but. 

For FIFA Quality Pro certification – the highest standard, and the one required for every elite match ball – the diameter is measured at 16 specific points around the ball. All of those measurements must fall within 1.5% of the average. That’s it. 1.5%. Any more variation than that and the ball fails. 

Why does it matter so much? Because even a tiny deviation from a perfect sphere changes how the ball travels through the air. Asymmetry introduces drift, wobble, unpredictability. These are things a goalkeeper or a striker can’t account for. The ball simply won’t do what physics says it should. 

Multi-point dimensional inspection is fundamental to quality manufacturing in almost every precision industry. Getting roundness right – and proving that you’ve got it right – is exactly the kind of challenge that metrology exists to solve. 

What’s interesting about the sphericity test is that it’s essentially the same challenge we see in precision bearing or turbine component inspection. You’re not just checking one point, you’re building a complete picture of a surface. The football is a great illustration of why that matters: a deviation you can barely see with the naked eye can completely change how an object behaves at speed. That’s true whether you’re talking about a ball travelling at 100 km/h or a component rotating at thousands of RPM.

3. The panels are fused, not stitched – and that changes everything 

The traditional football is a hand-stitched object with panels sewn together with polyester thread by skilled craftspeople. It’s a craft that goes back well over a century. At its best it produces balls of genuine durability and character. 

But every elite match ball since 2006 has been thermally bonded rather than stitched. Instead of sewing panels together, they are placed inside a heated mould and fused under pressure with precision adhesive. No thread, no needle, just heat, pressure, and materials engineered to bond seamlessly. 

The reason is straightforward once you understand what stitching actually does. Even the tightest hand-stitching creates micro-gaps at every seam. And micro-gaps mean water ingress,and pressure loss over time. Even subtle distortions in shape as the materials at the seam behave differently from the panels on either side. Thermal bonding eliminates all of that producing a surface that is more uniform, more water-resistant, and more dimensionally stable across the full duration of a match. 

It is a direct manufacturing response to what the testing programme was revealing – the seams were the weak points, and if you could eliminate them, you should. 

4. There’s a sensor inside the ball taking 500 readings per second 

This one is impressive. Inside one of the panels of the current official match ball sits a tiny inertial measurement unit – an IMU sensor. It records the ball’s acceleration, spin, rotation, and every moment of contact is measured, 500 times per second. That data is transmitted wirelessly, in real time, to match officials, where it is fused with footage from optical tracking cameras positioned around the stadium. 

The result is a precise, live picture of every event in the match – and in particular, an exact timestamp of the millisecond a player makes contact with the ball. That’s what makes semi-automated offside decisions possible. The system can now identify marginal offside positions that would have been impossible to call even a few years ago. 

But from a manufacturing standpoint, the sensor in the ball is as interesting as what it does. It has to be integrated into a panel that is then thermally bonded under heat and pressure, without compromising the sensor’s function, the panel’s structural integrity, or the ball’s balance. Any asymmetry in a ball this precisely specified would show up immediately in the sphericity measurement tests. The engineering challenge isn’t just building a sensor that works – it’s building one that disappears entirely once it’s inside the ball. 

5. Precision itself can create unfamiliar performance   

There’s a cautionary tale in the story – and it’s a good one. 

The Jabulani, the official ball used at the 2010 tournament in South Africa, became notorious almost immediately after play began. Goalkeepers were struggling with shots that seemed to move in ways they’d never encountered before. Players complained. Coaches complained. The ball itself became the story. 

The reason turned out to be counterintuitive. The ball was *too* round. Its near-perfect sphericity, combined with a smooth surface and fewer seams than previous balls, produced erratic aerodynamic behaviour at certain speeds. This is a phenomenon sometimes described as a knuckleball effect. Air couldn’t flow predictably around the surface, so the ball moved unpredictably through it. 

It’s a striking reminder that precision without complete understanding of the system you’re operating within can solve old challenges and while introducing new ones. In manufacturing, we’d call this an unintended consequence of optimisation. It’s exactly why testing in real-world conditions matters as much as measurement at the point of production. 

So next time you watch a goal go in, or a tight offside decision get overturned – it’s worth pausing for a moment. Think about the ball that was built for the job, and tested to the limits of manufacturing and measurement before it made the selection.  

At Hexagon, measurement, testing, and precision engineering are things we think about every day –  across manufacturing, the built environment and beyond. It’s genuinely satisfying to find all three at the heart of the world’s most-watched sporting event.

Watch the video to learn more: