At the 2026 Masters, Bryson DeChambeau once again drew attention to his equipment. Asked about the clubs he was working on, the American said he was building his own irons and driver, while remaining vague enough that it was unclear whether he was actually designing his own heads or modifying components made by another manufacturer. That uncertainty somehow suits a player who has spent much of his golfing life experimenting with an idea once considered marginal: playing every iron at the same length. Nine years after Cobra launched its first ONE Length sets, and two years after DeChambeau’s second U.S. Open victory, there is now enough distance to ask a different question. It is no longer really about whether single-length irons can work. DeChambeau has demonstrated that they are compatible with golf at the highest level, and many amateurs use them. The more relevant question is why they have not fundamentally changed the iron market.
The situation in 2026 is paradoxical. Single length has not disappeared. Cobra still sells it, Avoda now offers three different set configurations, and several specialist manufacturers remain active in the category. Yet conventional progressive-length iron sets are still overwhelmingly the norm. The market has not buried single length. Instead, it appears to have assigned it a place: an alternative solution that may suit certain golfers without becoming the new standard its advocates once envisaged.
Cobra continues, but remains virtually alone among the major manufacturers
When Cobra industrialised the ONE Length concept in 2017, the idea was straightforward: build the entire iron set around a length comparable to a 7-iron so that the golfer could maintain a more consistent posture, distance from the ball and swing from club to club. The concept remains in Cobra’s range today. The current KING TEC X ONE Length specifications list a length of 37.25 inches from the 4-iron through the gap wedge. But they also reveal something less obvious: equal length does not mean identical clubs. Lie angle progresses from 65 degrees in the 4-iron to 61.5 degrees in the gap wedge, while offset decreases from 4.8 to 1.5 mm. Cobra also uses a hollow-body construction and 70 grams of internal tungsten.
The technical paradox is clear: to simplify what the golfer has to do, engineers have to modify other characteristics of the clubs to preserve trajectory and distance gapping. More significantly, the expected knock-on effect across the industry never materialised. In 2026, ONE Length remains part of Cobra’s offering, but it has not become an architecture around which other major manufacturers have built their ranges. With no reliable public sales data broken down by set configuration, it is impossible to quantify its exact market share. The catalogues nevertheless show that single length remains a minority proposition.
Attributing that situation simply to manufacturer conservatism would be too easy. An unconventional technology also has to win over retailers, be supported by fitters who know how to demonstrate it, find a viable second-hand market and, above all, suit an amateur population in which a large proportion of players do not generate enough speed to launch shortened long irons easily. Those commercial and technical obstacles may matter just as much as the habits of manufacturers.
As early as 2016, testing had already revealed the benefits… and the limitations
Even before Cobra commercially launched its first ONE Length sets, the main challenges had already been identified. In September 2016, GOLF published a test conducted with Hot Stix. Golfers compared a conventional iron set with the same set rebuilt to 7-iron length. Specifications were controlled by Hot Stix and the shots measured on TrackMan, including speed, launch, peak height, landing angle and carry distance.
The results were far from negative. The testers produced more consistent distance gaps between clubs and, with the 4- and 5-irons, generally achieved better contact. But those long irons also produced lower trajectories. That could become a problem when trying to stop the ball on a green, particularly an elevated one. With the more lofted clubs, the benefits became less obvious, while conventional wedges produced more consistent dispersion in the test.
So even before Cobra turned single length into a mass-market product, its central compromise was already visible: standardising the swing may make contact easier, but shortening the long irons and lengthening the short ones inevitably changes their dynamic characteristics. In February 2017, MyGolfSpy then tested Cobra’s F7 ONE and Forged ONE irons with nine golfers ranging from scratch to nearly a 20 handicap and with different swing speeds. The players hit 5-, 7- and 9-irons from the ONE Length sets alongside their own clubs, with data recorded on a Foresight GC2 with HMT.
Results varied considerably from one golfer to another. MyGolfSpy identified mid-handicap golfers with moderate to high swing speeds but inconsistent contact as the profile most likely to benefit from the system. Conversely, slower-speed players, particularly seniors, could experience more difficulty with the long irons because of the reduction in clubhead speed. The test also provides a revealing historical detail: at the time, Cobra R&D vice-president Tom Olsavsky told MyGolfSpy that ONE Length sales were running at three times the company’s expectations. The commercial start was therefore strong enough to support the idea that the iron market might genuinely be changing.
Those tests involved small samples and generations of equipment that are now old. They cannot establish the overall superiority of one architecture over another. What they do is shift the discussion towards the question that really matters: which type of construction works best for which golfer?
Avoda and the emergence of the “combo length” compromise
Avoda did not appear after DeChambeau’s victory at Pinehurst in 2024. Its irons were already in the American’s bag, and that exposure played a major role in bringing a previously little-known brand to wider attention. What has changed since then is its commercial range and, above all, the way it now segments the different approaches to building an iron set. Avoda offers three configurations: Traditional Length, Same Length and Combo Length, and the company explains which player profiles each is designed for.
Same Length follows the complete single-length principle. Every club measures 37 inches, allowing the golfer to maintain the same distance from the ball and the same setup. Avoda positions this option both for newer players looking to develop a repeatable motion and for faster golfers who already generate enough height and want to simplify their setup. The way Avoda presents Combo Length is more revealing of how the concept has evolved. It recommends this option in particular for golfers who struggle to generate sufficient height or spin with their longer irons in a full single-length set, or who find their wedges and short irons too long and difficult to control.
In this configuration, Avoda builds the scoring clubs at 36 inches rather than the 37 inches used in Same Length, then gradually reintroduces variable lengths through the mid and long irons to promote better gapping, launch, height and spin as loft decreases. Combo Length is therefore not a rejection of single length. It retains standardisation where repeating the same posture may be beneficial, while abandoning complete uniformity when it risks compromising ball flight. The debate has consequently moved on from the early Cobra years: the question is no longer necessarily whether every iron should be the same length or whether the entire set should be conventional, but how far standardisation remains beneficial.
The real problem lies at both ends of the set
The difficulty with the long irons is relatively easy to understand. All else being equal, shortening a 4-iron to something close to 7-iron length tends to reduce the speed a golfer can generate. Because the loft remains low, the manufacturer has to compensate through head design, mass distribution, face technology, shaft characteristics or loft in order to produce a usable trajectory. The slower the player swings, the more difficult that equation becomes. Distance is not the only issue: a ball that flies too low and arrives with an insufficient descent angle may travel an acceptable distance while becoming far less effective when attacking a green.
At the other end of the set, the opposite problem emerges. Building a pitching wedge or gap wedge at 7-iron length forces the golfer to stand farther from the ball with clubs designed specifically for distance control. Some golfers adapt perfectly well; others may lose some of the comfort and precision they want from their scoring clubs. Avoda’s 2026 range is revealing because the manufacturer explicitly acknowledges both issues in its own guide: wedges that may feel too long at one end and long irons that can be difficult to launch at the other. Combo Length was specifically designed to address both.
It would be excessive to interpret this as an admission that Same Length does not work. It can, however, be seen as commercial recognition of something testing had already suggested a decade earlier: the benefits of standardisation are not necessarily identical from the 4-iron all the way to the wedge.
DeChambeau proves what is possible, not universal superiority
Bryson DeChambeau has played an enormous role in giving single-length irons credibility. He is also a highly unusual reference point if the aim is to extrapolate his equipment choices directly to the average golfer. DeChambeau has played same-length irons since his teenage years, meaning for more than 15 years. But adapting equipment to his system involves much more than taking a conventional set and cutting every shaft to the same length. Golf Digest reported that some versions of the Ping i230 irons he used required nearly 50 grams of additional mass in certain heads to achieve the characteristics he wanted.
His speed, trajectories, head weights, shafts and preferences therefore create an equipment system built specifically around him. At the 2026 Masters, he was still experimenting: just days after saying he was working on his own clubs, he put a 3D-printed 5-iron into competition, explaining that an individual head could be printed and machined in roughly a day and a half. DeChambeau therefore establishes something significant: it is possible to win at the highest level in golf with same-length irons. His victories do not, however, demonstrate that the average golfer will perform better with that architecture than with a conventional set.
Single length and curved faces: two innovations that should not be confused
The attention surrounding DeChambeau’s irons since 2024 has sometimes blurred two separate subjects: their length and the geometry of their faces. The Avoda irons that attracted attention at the 2024 Masters featured curved faces, with the degree of curvature adjusted throughout the set. The idea was intended in part to influence dispersion for a player with DeChambeau’s exceptionally high speed. At the time, those irons were not yet commercial products and had required USGA conformity approval before the tournament. Avoda subsequently developed commercial versions in 2025.
But a curved face is not a consequence of single-length construction. Avoda now offers different length architectures, while face geometry represents a separate design parameter. The two innovations can therefore be combined without being confused. That distinction matters when DeChambeau is used as evidence for the concept: his performance cannot be attributed to one characteristic of his irons when their design combines length, weight, loft, lie, shaft, face geometry and player-specific adjustments.
From promised revolution to lasting alternative
When we published an article in 2024 about the return of single-length irons to the spotlight following DeChambeau’s U.S. Open victory, we largely attributed their limited adoption to resistance from the industry and the conservatism of the major manufacturers. We also quoted André Thaon d’Arnoldi, founder of GolfNSwing, who argued that the advantage of a Single Length or Combo Length set was “mathematically indisputable”. Two additional years provide good reason to qualify that interpretation.
The logic behind it remains coherent: eliminating variations in club length can reduce the number of parameters a golfer has to adapt to from one club to another. But the equipment must simultaneously solve other problems: generating enough speed, height and spin with the long irons, maintaining consistent carry gaps and preserving the control expected from the wedges. The commercial history is also more nuanced than a simple rejection of innovation. When Cobra launched the KING F7 ONE and KING Forged ONE for the 2017 season, single length became one of the central themes of its iron range. Within weeks of their release, sales were already running well ahead of expectations. Nine years later, Cobra still offers ONE Length, demonstrating that the concept was not simply a passing fad. But it did not bring the rest of the major manufacturers with it.
At the same time, Avoda does not offer Same Length alone. It also sells Traditional Length and a Combo Length configuration explicitly intended to address some of the limitations of building an entire set to one length. The verdict in 2026 is therefore less dramatic than the revolution that was sometimes predicted, but probably more useful to golfers. Single-length irons have neither disappeared nor replaced conventional sets. They have established themselves as a different solution, potentially highly relevant for certain player profiles and less suitable for others.
And the evolution towards Combo Length shifts the question once again. Perhaps we should no longer be asking whether every iron should be the same length, but which ones actually benefit from being so.
Sources
- GOLF – Single-length irons against standard irons: tested, September 2016
- MyGolfSpy – Tested: 2017 Cobra ONE Length Irons
- Avoda Golf – Combo, Same or Traditional: How to Pick
- Cobra Golf – KING TEC X ONE Length Irons
- Golf Digest – Masters 2026: DeChambeau says he’s now “building” his own clubs
- Golf Digest – Masters 2026: DeChambeau’s 3D-printed 5-iron
- Golf Digest – Avoda Golf Origin, 2026 Hot List