Heung-min Son isn't just carrying the hopes of North London or South Korea on his shoulders; he’s carrying one of the most requested haircuts in the world. Seriously. Walk into any barbershop in Seoul or a trendy spot in Shoreditch and say "the Sonny," and they’ll know exactly what you mean.
But here’s the thing. Most guys mess it up. They think it's just a simple bowl cut or a basic undercut.
It isn't.
Sonny’s hair is a masterclass in the Korean Two-Block, specifically a version often called the "comma hair" or a "shadow perm" look. It’s effortless but requires a ton of hidden work. If you’ve ever tried to copy it and ended up looking like a medieval squire instead of a Premier League legend, you’ve probably missed the nuance.
The Anatomy of the Heung Min Son Haircut
Basically, the two-block means the hair is divided into two distinct sections. The sides and the back are clipped short—usually a #3 or #4 guard—while the top is left long and heavy.
Why does Son do this? It’s practical.
In a 2022 interview with GQ Korea, Son mentioned that he hates hair getting in his eyes during a match. "If my forehead is covered during the game, I can't see the ball very well," he said. That's why you always see him with that signature "comma" flick or the hair pushed back when he’s on the pitch. It's a mix of vanity and "I need to score a worldie from 30 yards."
Honestly, the "secret sauce" is the Down Perm.
If you have thick, coarse Asian hair, your side hair probably sticks straight out like a porcupine. Son uses a chemical treatment (the down perm) to flatten those sides so they hug the skull. Without this, the two-block looks bulky and weird.
What to Actually Ask Your Barber
Don't just show a blurry Instagram screenshot. Be specific.
- The Sides: Ask for a soft two-block. You don't want a skin fade. You want enough length (about 10mm to 12mm) so the hair looks dark and filled in, not bald.
- The Top: This needs to be long. Like, reaching-your-eyebrows long. Tell them to keep the weight but add texture so it doesn't look like a solid block of hair.
- The Back: A "tapered" back is better than a hard "block" back. It grows out much cleaner.
The Evolution: From Blond to Military Short
Sonny hasn't always played it safe. Back in the 2014 World Cup, he rocked a bright yellow-blond dye job. It was... a choice. By the time he hit his stride at Spurs, he settled into the natural dark brown/black "gentleman" look we see now.
Then there was the 2020 military stint.
When he went for his mandatory three-week service with the South Korean Marines, he had to get the "buzz." It was a jarring transition for fans used to his K-drama styling. But even with a crew cut, the guy had a certain "aura." It proved that the haircut is just the frame; the confidence does the heavy lifting.
How to Style it Like a Pro
You've got the cut. Now what?
You need a hairdryer and a decent wax. Son often uses a "comma" style where one side of the fringe curves inward toward the forehead.
- Blow-dry for volume: Dry your hair upwards and backwards. Don't just let it sit flat.
- The "C" Curve: Take a small amount of matte wax (Hairbond Shaper is a popular shout in the UK for this look) and twist the front section of your hair into that "C" shape.
- The Parting: Son usually rocks a 60/40 or 70/30 part. It’s not a straight line; it’s a bit messy.
If your hair is naturally very straight, you might actually need a Shadow Perm. This isn't the 80s "grandma" perm. It’s a light chemical wave that gives the hair "memory" so it stays messy and voluminous without you fighting it for twenty minutes every morning.
Why it Works (and Why it Might Not for You)
The Heung Min Son haircut is great for oval or heart-shaped faces. Because the sides are tight and the top has volume, it elongates the face.
If you have a very long face, be careful. Too much height on top will make you look like a Slim Jim.
Also, hair texture matters. If you have very curly hair, the two-block is going to look completely different—more like a modern mullet or a textured crop. That’s fine, but it’s not the "Sonny."
Maintenance 101
This isn't a "get it and forget it" cut.
- Trims: Every 3 to 4 weeks. Once those sides grow out, the "two-block" effect disappears and you just have a mushroom.
- Product: Avoid heavy gels. They make the hair look greasy. You want a matte clay or a "sea salt spray" to keep it looking airy.
- Scalp Care: Son is a brand ambassador for TS Shampoo (a huge hair-loss prevention brand in Korea). Whether he actually uses it or just gets paid for it, the lesson is the same: healthy hair styles better.
Actionable Next Steps
If you're ready to make the jump, here's how to ensure you don't regret it.
First, grow your hair out for at least two months. You can't get a two-block if your top hair is short. You need that length to create the "overlap" on the sides.
Second, find a barber who specifically understands Asian hair textures. They will know how to handle the "protruding side hair" issue that ruins most versions of this cut.
Finally, buy a vent brush. It’s the tool barbers use to get that flick in the front. Use it while blow-drying on medium heat to guide the hair into that comma shape. Once you nail the technique, it takes about three minutes to look like you're ready to walk out of the tunnel at Tottenham Hotspur Stadium.