The 10 Biggest Dragons in the Game of Thrones Universe, Ranked by Sheer Size

Let's be honest—dragons are half the reason anyone tunes in for Game of Thrones or House of the Dragon. If you're not here for the family squabbles and sudden betrayals, it's all about the massive, fire-breathing monsters soaring over Westeros. Now, House of the Dragon has absolutely run wild, boasting at least 17 dragons—some on screen, others just name-dropped or glimpsed in passing shadow. Not every fan can keep them all straight, though, so given that Season 3 is looking rather explosive for the Targaryens, here's a proper rundown of the ten most colossal dragons in the lore, and what makes each one worth remembering.

The Heavyweights of the Skies: 10 Biggest Dragons

1. Balerion – The Black Dread
   Every time you see a gigantic dragon skull looming in the Red Keep, that's Balerion. Proper legend, this one. He was Aegon the Conqueror's pride and joy, the original Targaryen power move when they rocked up to Westeros. Black as pitch, with a fire that ran so hot it could blacken stone, he had a reputation for casting a shadow that could swallow a town whole. Seriously. Balerion was born in Valyria long before the Targaryens ever showed up at Dragonstone—possibly even before 114 BC. After Aegon I, he carried three more riders (Maegor I, Princess Aerea, and Viserys I), but by the end, he was far too old for the job and died of natural causes in 94 AC. Oh, and apparently he could eat an aurochs, or even a mammoth, whole. Absurd unit of a dragon.
2. Meraxes
   Mentioned by Rhaenyra in House of the Dragon S2, Meraxes was the number two dragon during Aegon's Conquest, with only Balerion being bigger at the time—Vhagar ran slightly smaller. Silver-white scales, golden eyes, and a soft spot for her only-ever rider, Rhaenys (Aegon's sister-wife). Meraxes died in 10 AC after copping an iron bolt to the eye in Dorne, which set Aegon and Visenya off on what history now calls the ‘Dragon's Wroth’—basically, a firestorm of revenge on the Dornish strongholds.
3. Vhagar – Queen of All Dragons
   Currently Prince Aemond's absolute unit in House of the Dragon—Vhagar almost rivals Balerion in sheer size, though it took her centuries to get there. Bronze scales with blue-green undertones and bright green eyes, plus a roar that could rattle castles. She's swallowed whole horses and had her fair share of riders: Visenya, Baelon, Laena Velaryon, and now, Aemond. With Balerion deceased, Vhagar's the current reigning monarch of the dragons, largest and oldest by far. She's a literal tank; do not mess about.
4. The Cannibal
   Wild, untamed—and quite frankly, a bit of a wrong ‘un. Only referenced so far, the Cannibal is massive, definitely ancient, and took up residence on Dragonstone before the Targaryens even set up shop (or so the stories say). Known for eating other dragons (and their eggs), which is both on-the-nose and nightmare fuel. No one's ever managed to ride him—not even the ambitious ‘dragonseeds’ in Fire & Blood tried. Can't imagine how the show would tackle this one.
5. Vermithor – The Bronze Fury
   Before Hugh Hammer jumped aboard in House of the Dragon S2, Vermithor was the trusty steed of King Jaehaerys I. Massive, bronze, and probably breathes fire that's more golden or reddish in the books. By the end of Jaehaerys’ very long reign, Vermithor still stuck close, but after a quiet period went to Hugh (whose mum might actually be a Targaryen princess, if rumours hold up).
6. Silverwing
   Far and away the most even-tempered dragon you'll read about—possibly too friendly, really. She started as Queen Alysanne Targaryen's companion, lovely silver scales, and (so it's said) pale blue flames. She was a reliable partner for decades, and after Alysanne died, only took up with a new rider much later—a commoner called Ulf White. Not all dragons are volatile nightmares, apparently.
7. Dreamfyre
   Fitting name for the ‘dreamer’ queen Helaena Targaryen, who claims her in House of the Dragon, though never rides her. Dreamfyre hatched back during Aegon I's time, and her first rider, Princess Rhaena, had about the worst luck going—imagine being forced to marry Maegor the Cruel, and only escaping with your dragon, your child, and a stolen Valyrian sword. Dreamfyre’s got pale blue scales and silver traces. Also, tinfoil-hat theory time: she might actually be the mother of Daenerys’ trio of dragons, since her eggs were stolen and shipped east. Never officially confirmed, but it makes a bit of sense.
8. Sheepstealer
   Another wild dragon, this one partial to the local livestock (hence the name). Brown scales, flames with a hint of red or gold, and not usually a threat to people unless you go looking for trouble. In Fire & Blood, a dragonseed named Nettles tames him during the Targaryen civil war, but in the show, it looks like Princess Rhaena is getting that storyline instead. Either way, not as much a people-eater as the Cannibal, but still not exactly friendly.
9. Caraxes – The Blood Wyrm
   Easily the most distinctive-looking, thanks to that snaky, elongated neck. Deep red scales and built more like a serpent crossed with a warhorse than the classic, chunky dragon silhouette. Caraxes was first paired with Prince Aemon (the king's eldest son), later with Prince Daemon Targaryen. Ridiculously aggressive in combat, maybe not the bulkiest but you’d never bet against him in a fight.
10. Drogon
    Yes, strictly speaking, he's only huge by modern Westeros standards, not compared to Valyria's golden age—still, he's the largest one Daenerys Targaryen hatched, and some call him ‘Balerion come again’. Black scales shot through with red, eyes like burning coals, fire that in the books is almost black. He hatched out in the Dothraki Sea (far from civilisation), managed to get enormous against all odds, and is the last known dragon alive by the time Game of Thrones wraps up. Maybe off exploring the ruins of Old Valyria—who knows, really?

Bit of Extra Flavour

House of the Dragon is already littered with references and brief glimpses of dragons who may or may not get their proper due—Meleys, for instance, just misses out on this Top 10. If you're the type who wants every name, egg, and sympathy for the dragonseeds, now's the time to start revising. Once the civil war kicks up a notch, expect a lot less majestic sweeping shots and a lot more claw, flame, and utter chaos.

"His shadow could engulf whole towns when he passed overhead." – Description of Balerion the Black Dread

All these stories are tangled up with family drama, dead riders, and more than a few historical gaps (especially with the wild or unclaimed dragons). Even George R. R. Martin doesn't bother nailing down exact years half the time, so if you find the timelines murky, you're not alone.

Still, dragons are what make Targaryen politics tolerable—otherwise, we'd all have switched off after the second council meeting. Stay tuned for more mayhem and, as ever, keep your livestock penned up if you hear wings overhead.