WEIGHT CLASSES
All 11 Lethwei divisions — flyweight through openweight.
Lethwei was originally an openweight art. The codified divisions you see today were introduced in the 20th century, primarily through Kyar Ba Nyein's reforms after he returned from the 1952 Helsinki Olympics. Below: every sanctioned weight, the styles that thrive there, and the fighters who define each class.
Flyweight
The smallest sanctioned division. Speed, accuracy, and footwork dominate at this weight; one-shot knockout power is rare, so flyweight bouts are usually decided by accumulated damage rather than single moments.
→ Has historically been the deepest division in Myanmar's regional sandpit circuits but has only seen limited international promotion.
Bantamweight
Where technical pressure fighters often emerge. The 6-pound jump from flyweight increases knockout potential measurably, and the bantamweight clinch game is among the most refined in the sport.
→ Souris Manfredi headlined the WLC women's strawweight/bantamweight divisions and changed how the women's game is perceived.
Featherweight
The marquee weight for technical Myanmar fighters. At this weight, southpaw counter-strikers have historically dominated because the speed differential makes timing-based finishes possible in ways the heavier classes don't allow.
→ Soe Lin Oo and Ye Thway Ni have defined the modern WLC featherweight game.
Lightweight
The crowd-pleaser division. The combination of speed, power, and durability at lightweight produces the most consistently watchable bouts on a typical card. Clinch knees become genuinely dangerous; headbutts gain real stopping power.
→ Too Too's lightweight reign in the 2000s defined sandpit-era violence; Lone Chaw's modern lightweight title carries the Karen technical lineage forward.
Welterweight
The international crossroads. Most foreign fighters who arrive in Myanmar walk around at welterweight or middleweight, so this is the division where the most cross-cultural bouts have happened. Kyar Ba Nyein himself fought welterweight at the 1952 Helsinki Olympics.
→ Cyrus Washington and Antonio Faria built international careers in this division.
Middleweight
The first weight at which one clean strike can end a fight regardless of technical execution. Saw Gyi-style headbutt finishes are most common in this range — the mass behind a frontal headbutt at 160 pounds is genuinely concussive.
→ Saw Gyi (sandpit), Artur Saladiak (WLC) and Phyan Thwei (modern Myanmar) define this division across eras.
Light Heavyweight
A tier where Myanmar fighters historically thinned out and international fighters became more common. The balance shifts toward conditioning at this weight — fighters who can maintain pressure across all rounds tend to defeat better technicians who cannot.
→ Eh Moo's modern Karen-style game has been the headline at this weight in recent WLC cards.
Cruiserweight
The WLC-specific division between light heavy and openweight. Created to give Dave Leduc and similar-sized international fighters a sanctioned platform that didn't require giving up size to Myanmar openweights.
→ Dave Leduc's WLC Cruiserweight title is the highest-profile international Lethwei championship of the modern era.
Heavyweight
Rare in Lethwei. Most Myanmar fighters never reach this weight, and the division exists primarily for international invitational matchups. Bouts at this weight are short and decisive — there is little technical filigree once both fighters have 200+ pounds of body mass behind their strikes.
→ Few sanctioned bouts; mostly exhibition or special-rules cards.
Openweight
The most prestigious and historically significant Lethwei division. The Openweight Golden Belt is considered pound-for-pound supreme and has been contested between fighters with significant size differentials throughout the sport's history. Old-school Lethwei was always openweight by default — the codified divisions are a 20th-century addition.
→ Tun Tun Min and Dave Leduc fought their trilogy at openweight; the Golden Belt itself is openweight in its highest form.
How the modern divisions actually got built
Until the 1950s, Lethwei was an openweight art. Fighters arrived at the sandpit, were sized up by the sayar, and were matched by eye. A 65 kg Karen technician could be matched against an 80 kg Mandalay puncher if both coaches agreed the bout was honourable, and the cultural framing of "honourable" tilted strongly toward giving the lighter fighter a path to win on technique and conditioning. The introduction of formal weight classes in the post-independence era was a deliberate import, led by Kyar Ba Nyein after his trip to the 1952 Helsinki Olympics. He returned convinced that international codification required the same kind of standardised divisions that boxing and Olympic wrestling had — and the Myanmar Traditional Lethwei Federation's first division list, published in 1953, mirrors the boxing weights of the period almost exactly.
The eleven classes used today are the product of three further rounds of reform. The WLC's launch in 2017 standardised the division list used across international cards and, in particular, codified the women's strawweight division for the first time at an international level. The MTLF's 2020 revision aligned the heavier classes with the global combat-sports norm by moving cruiserweight from 200 lb to 195 lb and confirming Openweight as a true no-upper-limit category rather than the de facto super-heavyweight it had operated as before. A smaller 2024 administrative pass added the Light Welterweight and Light Middleweight buffer classes to give matchmakers more flexibility around the gaps that had been producing awkward cuts.
Championship lineage and what it tells you
Two things separate a serious Lethwei championship from a notional one. The first is depth of competition — a division with four credible contenders behind the title-holder is meaningfully different from one with a champion and a long tail of overmatched challengers. By that measure, the WLC's cruiserweight, openweight, middleweight, and women's strawweight titles are the deepest divisions in the modern sport. Lightweight is rising fast. The flyweight and bantamweight women's divisions are still being built — credible champions exist, but the contender pool is shallower than the headlines suggest.
The second is the title's transferability across organisations. The Openweight Golden Belt held under MTLF auspices is the historically deepest belt in Lethwei because it has been defended across both the MTLF and the WLC and because its holders have included both Myanmar and international fighters at the top of their careers. National federation titles in France, Poland, Ukraine and Australia are meaningful within their jurisdictions but do not transfer cleanly outside them — a French national champion who comes to the WLC is treated as a fresh prospect, not a title-holder, and the matchmaking reflects that.
Matchmaking implications by class
The lighter divisions favour technical, footwork-led fighters with sustainable conditioning over five rounds. A flyweight or bantamweight bout almost never ends with a single concussive shot — the finishes that happen come from accumulated damage in the late rounds, often through clinch knees or a cut-induced stoppage rather than a clean knockout. Conditioning is the great differentiator and the fighters who win these divisions long-term are the ones with the deepest aerobic base. The middleweight and light-middleweight bands are where the sport's "complete" fighters tend to land — heavy enough to finish with a single shot, light enough to maintain real five-round pace, technical enough to read the opponent through round two and adjust by round three.
The light-heavyweight and cruiserweight bands are where punching power and the headbutt threat become structurally decisive. A cruiserweight clinch with serious knee output is, on the WLC card, the single most common finish pattern at the top of the sport. The openweight class amplifies this further but also introduces a more dramatic mismatch potential — an openweight bout matched between a natural 95 kg fighter and a natural 110 kg fighter is, despite the formal no-limit, a meaningfully different contest from one matched within 5 kg.
Cuts, multi-class movement, and the rehydration window
Weight cuts in Lethwei tend to be smaller than the equivalent boxing or MMA cut, for two reasons. There is no judges' decision under traditional rules — the scorecard advantage that drives extreme cuts in boxing simply does not exist in the cultural frame the sport operates within. And the bareknuckle context introduces a hand- injury risk that compounds with dehydration. The fighters who cut hardest are also the fighters whose first-bout-after-the-cut hand injuries appear in the medical records most often. The WLC's 24-hour rehydration window between weigh-in and bout is the structural fix — not enough time for the most aggressive cuts to be metabolically worthwhile, enough time for a moderate cut to be fully rehydrated.
Multi-division movement is common in the middle and upper classes. A fighter at the top of the middleweight division will often take a non-title bout up at light-heavyweight when a credible matchup exists; a cruiserweight will frequently move to openweight in the same pattern. Movement down by more than one division is rare and almost always signals a career inflection rather than a competitive choice. The fighters most likely to win consistently across divisions are the ones who do not cut hard at their natural class — the conditioning headroom that protects against extreme cuts also protects against the demands of moving up.
The women's division weight system
The women's class structure is shallower than the men's — currently only strawweight, flyweight, bantamweight, and featherweight are actively contested at international level — but it has built more depth over the past four years than any other part of the sport. Strawweight is the deepest, anchored by Souris Manfredi's long reign and the rise of Ei Phyu Lwin behind her. Flyweight has a credible champion (Lilia Kurbanova) and an active contender pool. Bantamweight and featherweight have recognised champions but thinner depth — a credible challenger at either class would meaningfully change the division within one cycle. The path to an international women's openweight or light-heavyweight class remains an open question; the rosters do not yet justify the sanctioning, and the federations have been honest about that.