Let's be real for a second. If you've spent more than five minutes on the UK side of the internet, you've seen the memes. You've seen the "fatneek" jokes, the forehead roasts, and most importantly, the endless debate about how tall KSI actually is. It’s become a bit of a legendary saga in the Sidemen universe. JJ Olatunji—the man, the myth, the Prime-slurping mogul—has spent years claiming the "6-foot club" status, but the internet has receipts that say otherwise.
Honestly, the height of a YouTuber shouldn’t be this big of a deal. But when you’re a professional boxer and a global entertainer, those inches matter. Or at least, the denial of those inches is what makes it so funny.
How Tall Is KSI Really?
For a long time, if you Googled it, you’d see a solid 6 feet (183 cm). That was the "official" word. It’s what was on the boxing tale of the tapes, and it’s what JJ told anyone who would listen. He basically made it his entire personality for a while. "I'm 6 foot, guys, allow it!" became a frequent cry in his Reddit videos.
But then, the truth started leaking out. Fans are brutal, man. They started comparing him to other people in photos. They looked at him standing next to Logan Paul, who is a legit 6'2". The math just wasn't mathing. In the 2019 rematch face-off, the height difference looked like a lot more than just two inches.
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Eventually, the pressure got to him. In a classic self-deprecating YouTube video back in 2020, JJ finally caved. He measured himself on camera. The result? 5 feet 11 inches. Actually, it was technically 5'10.75" if you want to be super petty about it, but he rounded up to 11. Since then, the "5'11" tag has stuck to him like glue. It’s the ultimate middle ground between his 6-foot dreams and the fans who swear he’s actually 5'9".
The Great Boxing Measurement Scandal
Boxing is weirdly notorious for "height inflation." Promoters love to add an inch or two to make fighters look more intimidating on the poster. When KSI fought Logan Paul, the stats listed him at 6'0". When he fought Tommy Fury, the numbers shifted again.
If you look at his 2026 presence, JJ has mostly embraced the meme. He knows he’s not a giant.
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- Claimed Height: 6'0" (183 cm)
- Actual Height: ~5'11" (180 cm)
- The "Reddit" Height: 5'9" (According to his most dedicated trolls)
There was even that hilarious moment where fans "ambushed" him at a Walmart with a tape measure. You can't make this stuff up. He was wearing shoes, obviously, which adds that "sneaker boost" we all rely on at the club. Without the Nike Air Forces, he’s definitely hovering right at that 180 cm mark.
Why the Internet Won't Let It Go
It’s not really about the height anymore; it’s about the "Knowledge, Strength, Integrity" (KSI) irony. Fans find it hilarious that a guy who literally has "Integrity" tattooed on his body would lie about an inch of height.
Compare him to the rest of the Sidemen and it gets even more confusing.
- Simon (Miniminter) is clearly the tallest, standing at about 6'1" or 6'2".
- Josh (Zerkaa) is usually around the same height as JJ.
- Tobi and Vik make JJ look like a titan, which probably fuels his ego.
Then you have the Tommy Fury fight. Tommy is a professional boxer from a family of giants. Standing next to a "real" 6-foot-plus athlete, JJ looked notably smaller. But hey, in the ring, reach and movement matter more than the top of your head. He’s got a 76-inch reach, which is actually massive for someone of his stature. That’s probably why he can still hang with the bigger guys.
The Verdict on Those Inches
So, where do we land? If you see KSI in the street, he’s going to look like a normal-sized, athletic guy. He’s not short. But he’s also not the 6-foot powerhouse he used to claim on his Tinder profile (probably).
Basically, he’s 5'11".
If you want to be a part of the joke, call him 5'10". If you’re a die-hard fan, give him the 6 feet. But the evidence—from his own measuring tape to his face-offs with the Paul brothers—points to 180 cm.
The most important thing to do now is go watch one of his old Reddit reactions. You’ll see him lose his mind over a height meme, and honestly, that’s better entertainment than knowing his exact measurements anyway. If you're tracking his boxing career, keep an eye on the "Tale of the Tape" for his next fight—it’s almost guaranteed the promoters will try to sneak that 6'0" stat back in there for the vibes.