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So there's been a lot of questioning about this. Here's my approximations on some key primarchs.
-Leman Russ: 14ft (stated to be 1.75*an astartes in every physical dimension)
-Horus: 15ft (just a rough guess based on official art depicting him in excess of twice the height of an astartes)
-Sanguinius: 13 feet (shown in official art to be shorter than Horus)
-Magnus the Red: height varies due to sheer psychic power of biology. In general 9-10ft when trying to be unintimidating. 18-20ft normally. Both he and Russ literally grew to Warlord Titan size when they got serious in thier fight.
-Angron: 12ft (shown to be shorter than his brothers but far thicker in musculature)
-Fulgrim: 12ft (same as Angron but not nearly as thick)
-Ferrus Manus: 14ft (shown to be taller than most primarchs like Russ)

Those are some crazy numbers, methinks. My impression is that primarch's would be more in the 9ft range(if we accept that average astartes to be ~7.5ft).

I don't have any references to point to other than some artwork and the classic 'head and shoulders taller' description I've come across, but that feels more sensible to me.

 ThePrimordial wrote:
So there's been a lot of questioning about this. Here's my approximations on some key primarchs.
-Leman Russ: 14ft (stated to be 1.75*an astartes in every physical dimension)
-Horus: 15ft (just a rough guess based on official art depicting him in excess of twice the height of an astartes)
-Sanguinius: 13 feet (shown in official art to be shorter than Horus)
-Magnus the Red: height varies due to sheer psychic power of biology. In general 9-10ft when trying to be unintimidating. 18-20ft normally. Both he and Russ literally grew to Warlord Titan size when they got serious in thier fight.
-Angron: 12ft (shown to be shorter than his brothers but far thicker in musculature)
-Fulgrim: 12ft (same as Angron but not nearly as thick)
-Ferrus Manus: 14ft (shown to be taller than most primarchs like Russ)

Wait what's this about warlord size?

 ThePrimordial wrote:
So there's been a lot of questioning about this. Here's my approximations on some key primarchs.
-Leman Russ: 14ft (stated to be 1.75*an astartes in every physical dimension)
-Horus: 15ft (just a rough guess based on official art depicting him in excess of twice the height of an astartes)
-Sanguinius: 13 feet (shown in official art to be shorter than Horus)
-Magnus the Red: height varies due to sheer psychic power of biology. In general 9-10ft when trying to be unintimidating. 18-20ft normally. Both he and Russ literally grew to Warlord Titan size when they got serious in thier fight.
-Angron: 12ft (shown to be shorter than his brothers but far thicker in musculature)
-Fulgrim: 12ft (same as Angron but not nearly as thick)
-Ferrus Manus: 14ft (shown to be taller than most primarchs like Russ)

Clearly you have been taking something illegal.

Astartes 7ft5
Terminators 8ft5
Primarchs 9ft5

Each one varies and can have shorter and taller examples.

 Vaerros wrote:
Those are some crazy numbers, methinks. My impression is that primarch's would be more in the 9ft range(if we accept that average astartes to be ~7.5ft).

I don't have any references to point to other than some artwork and the classic 'head and shoulders taller' description I've come across, but that feels more sensible to me.

It's more than "head and shoulders" bud. In some rather early artwork space wolves attacking Prospero come up to Magnus' knees.
And for Russ his height would still be 13 feet given the Astartes height you gave.
The general numbers for a Primarch are 1.5 to 1.75 times the scale of an Astartes in every dimension.
Alpharius was stated to be the height of a very tall Astartes. So about 9ft. And Alpharius was a midget to his brothers.

 ThePrimordial wrote:

 Vaerros wrote:
Those are some crazy numbers, methinks. My impression is that primarch's would be more in the 9ft range(if we accept that average astartes to be ~7.5ft).

I don't have any references to point to other than some artwork and the classic 'head and shoulders taller' description I've come across, but that feels more sensible to me.

It's more than "head and shoulders" bud. In some rather early artwork space wolves attacking Prospero come up to Magnus' knees.
And for Russ his height would still be 13 feet given the Astartes height you gave.
The general numbers for a Primarch are 1.5 to 1.75 times the scale of an Astartes in every dimension.
Alpharius was stated to be the height of a very tall Astartes. So about 9ft. And Alpharius was a midget to his brothers.

Given that what we have to work with numbers-wise is quite inconsistent(I've definitely come across literature where a primarch was described as being 'head and shoulders' taller), I'll go with what seems sensible to me. ~13ft is just comically tall, I would say.

 Vaerros wrote:

 ThePrimordial wrote:

 Vaerros wrote:
Those are some crazy numbers, methinks. My impression is that primarch's would be more in the 9ft range(if we accept that average astartes to be ~7.5ft).

I don't have any references to point to other than some artwork and the classic 'head and shoulders taller' description I've come across, but that feels more sensible to me.

It's more than "head and shoulders" bud. In some rather early artwork space wolves attacking Prospero come up to Magnus' knees.
And for Russ his height would still be 13 feet given the Astartes height you gave.
The general numbers for a Primarch are 1.5 to 1.75 times the scale of an Astartes in every dimension.
Alpharius was stated to be the height of a very tall Astartes. So about 9ft. And Alpharius was a midget to his brothers.

Given that what we have to work with numbers-wise is quite inconsistent(I've definitely come across literature where a primarch was described as being 'head and shoulders' taller), I'll go with what seems sensible to me. ~13ft is just comically tall, I would say.

The Primarchs aren't human. They're kinda supposed to be hilariously tall.
The artwork of 30ft Magnus is showing up for everyone right?

They were 20 ft tall...with a shock of red hair, and arms like tree trunks!

 dementedwombat wrote:
They were 20 ft tall...with a shock of red hair, and arms like tree trunks!

I know you're joking but this is actually an accurate description for Magnus.
His brothers averaged 12-13 feet though.

No, they were 12 stories high and made of Radiation.

What, no one told you George Washington was a Primarch?

Anyway, from the artwork that I saw, Horus is supposed to be around the same height of the emperor.




Going by that showdown between empy and horus, and assuming a space marine is 7 feet tall, you are probably looking at a 9-10 foot tall primarch.

I think your estimates are off. Primarchs were indeed taller than Astartes, significantly so, but 12-15 ft. seems ridiculous. No offence.

For comparison, here's a bunch of them lined up

No you all got it wrong!!!!

They were 12 miles tall, belched tactical nukes, and threw mountains at incoming imperial battleships.
They actually used thier flagships as swords to duel each other with.


Automatically Appended Next Post:

 CthuluIsSpy wrote:
No, they were 12 stories high and made of Radiation.

What, no one told you George Washington was a Primarch?

Anyway, from the artwork that I saw, Horus is supposed to be around the same height of the emperor.




Going by that showdown between empy and horus, and assuming a space marine is 7 feet tall, you are probably looking at a 9-10 foot tall primarch.

If you were to zoom out of the second picture Horus would be at least twice the height of those astartes.
You can tell from what little sticks out of the marines.

It's official, humans are like Orks. The more powerful and senior you are the taller you are.

 SarisKhan wrote:
I think your estimates are off. Primarchs were indeed taller than Astartes, significantly so, but 12-15 ft. seems ridiculous. No offence.

Again they were never human.
And Russ is literally described as 1.75 times the scale of an astartes in every dimension.

Actually, no. The astartes on the Emperor's side are on a lower elevation. The Astartes on Horus's side are on the same elevation as him. If you were to bring the astartes out of the background, you'd find they would be more than half his size. In fact, the astartes to the left of Horus is up to his elbow, and he appears to only be a few feet back.

 CthuluIsSpy wrote:
Actually, no. The astartes on the Emperor's side are on a lower elevation. The Astartes on Horus's side are on the same elevation as him. If you were to bring the astartes out of the background, you'd find they would be more than half his size. In fact, the astartes to the left of Horus is up to his elbow, and he appears to only be a few feet back.

Sanguinius must be like 5'9 then.

 ThePrimordial wrote:

 CthuluIsSpy wrote:
Actually, no. The astartes on the Emperor's side are on a lower elevation. The Astartes on Horus's side are on the same elevation as him. If you were to bring the astartes out of the background, you'd find they would be more than half his size. In fact, the astartes to the left of Horus is up to his elbow, and he appears to only be a few feet back.

Sanguinius must be like 5'9 then.

Closer to 8-9 feet. Since we can see his whole body, and since it was on roughly the same level as Horus, we can measure him out and compare him to Horus. He only appears to be about a foot shorter. Assuming Horus is 9-10 feet, that would make Sanguinius around 8-9 feet. Which is still pretty tall.

 CthuluIsSpy wrote:

 ThePrimordial wrote:

 CthuluIsSpy wrote:
Actually, no. The astartes on the Emperor's side are on a lower elevation. The Astartes on Horus's side are on the same elevation as him. If you were to bring the astartes out of the background, you'd find they would be more than half his size. In fact, the astartes to the left of Horus is up to his elbow, and he appears to only be a few feet back.

Sanguinius must be like 5'9 then.

Closer to 8-9 feet. Since we can see his whole body, and since it was on roughly the same level as Horus, we can measure him out and compare him to Horus. He only appears to be about a foot shorter. Assuming Horus is 9-10 feet, that would make Sanguinius around 8-9 feet. Which is still pretty tall.

The vast majority of Sanguinius' body is shown and he is half Horus' height. The only thing not shown is his feet.
Look at the difference in thier chests and legs.
If Horus is 10 feet then Sanguinius would literally be like 5'9.

Russ, Wolves and Sisters of Silence (near Astartes size in Collected Visions).


I think it is like this:
Astartes: average 7,5". Perhaps 8".
Alpharius and Omegon: 7,5", perhaps 8". Slightly bigger than the average Astartes.
Russ and Angron were the shortest of the rest. 8,5", perhaps 9".
Then the rest. Horus looks bigger because he is wearing Terminator Armour. I will go for 9,5", perhaps even 10". That´s a giant.
Then Magnus. 11"?

Horus measure 8.5 inches in the drawing. Sanguinuius measures about 5.2

 ThePrimordial wrote:

 CthuluIsSpy wrote:

 ThePrimordial wrote:

 CthuluIsSpy wrote:
Actually, no. The astartes on the Emperor's side are on a lower elevation. The Astartes on Horus's side are on the same elevation as him. If you were to bring the astartes out of the background, you'd find they would be more than half his size. In fact, the astartes to the left of Horus is up to his elbow, and he appears to only be a few feet back.

Sanguinius must be like 5'9 then.

Closer to 8-9 feet. Since we can see his whole body, and since it was on roughly the same level as Horus, we can measure him out and compare him to Horus. He only appears to be about a foot shorter. Assuming Horus is 9-10 feet, that would make Sanguinius around 8-9 feet. Which is still pretty tall.

The vast majority of Sanguinius' body is shown and he is half Horus' height. The only thing not shown is his feet.
Look at the difference in thier chests and legs.
If Horus is 10 feet then Sanguinius would literally be like 5'9.

You can see his feet. Look at the throne room picture. In the picture where they are all lined up, Sanguinius is furthest away, so of course he looks smaller. Compare him to the guy next to him, and the guy after that, and you will see they are all roughly the same height. Horus and Magnus are clearly the tallest of the bunch.

 da001 wrote:
Russ, Wolves and Sisters of Silence (near Astartes size in Collected Visions).

Spoiler:

I think it is like this:
Astartes: average 7,5". Perhaps 8".
Alpharius and Omegon: 7,5", perhaps 8". Slightly bigger than the average Astartes.
Russ and Angron were the shortest of the rest. 8,5", perhaps 9".
Then the rest. Horus looks bigger because he is wearing Terminator Armour. I will go for 9,5", perhaps even 10". That´s a giant.
Then Magnus. 11"?

Alpharius is not slightly bigger. Your estimates don't even account for an increase in size there but whatever. Alpharius is the height of a very tall astartes or custodes. He's like 9 feet tall.
Magnus 11 feet tall.
Have you seen the cover art of A Thousand Sons?
Look at the space marines at the very back where Magnus is.
They come up to his thighs while he's doing some kind of bizarre kneel (or on far lower ground then the astartes) and it takes 3 lined up side to side to obscure his thighs.


Automatically Appended Next Post:

 CthuluIsSpy wrote:

 ThePrimordial wrote:

 CthuluIsSpy wrote:

 ThePrimordial wrote:

 CthuluIsSpy wrote:
Actually, no. The astartes on the Emperor's side are on a lower elevation. The Astartes on Horus's side are on the same elevation as him. If you were to bring the astartes out of the background, you'd find they would be more than half his size. In fact, the astartes to the left of Horus is up to his elbow, and he appears to only be a few feet back.

Sanguinius must be like 5'9 then.

Closer to 8-9 feet. Since we can see his whole body, and since it was on roughly the same level as Horus, we can measure him out and compare him to Horus. He only appears to be about a foot shorter. Assuming Horus is 9-10 feet, that would make Sanguinius around 8-9 feet. Which is still pretty tall.

The vast majority of Sanguinius' body is shown and he is half Horus' height. The only thing not shown is his feet.
Look at the difference in thier chests and legs.
If Horus is 10 feet then Sanguinius would literally be like 5'9.

You can see his feet. Look at the throne room picture. In the picture where they are all lined up, Sanguinius is furthest away, so of course he looks smaller. Compare him to the guy next to him, and the guy after that, and you will see they are all roughly the same height. Horus and Magnus are clearly the tallest of the bunch.

Sanguinius is actually the closest because he covers up parts of Horus.

Wait, I'm confused. Which image are you talking about?

I once accidentally found some fan fiction which gave the size of some of their penises. So there's that if you want.

A couple more:

The classic "The Traitor Primarchs".
Both The Red Angel (the one floating), Abaddon and Arhiman are close enough to Horus to get a sense of proportion.
Wow, Ingethel the Ascended is so sexy. Best looking female Daemon ever.


Guilliman punching out the head of a Word Bearer.
It is hard to get a sense of scale, but I find it fun.

 ThePrimordial wrote:

Alpharius is not slightly bigger. Your estimates don't even account for an increase in size there but whatever. Alpharius is the height of a very tall astartes or custodes. He's like 9 feet tall.

That´s what I meant by "slightly bigger". They were supposed to be able to disguise as an Astartes.

I don´t know where did you get the Alpharius is 9 feet tall. If he were 1-2 feet over an Astartes, then no way he could be mistaken with one.

 da001 wrote:
A couple more:

The classic "The Traitor Primarchs".
Both The Red Angel (the one floating), Abaddon and Arhiman are close enough to Horus to get a sense of proportion.
Wow, Ingethel the Ascended is so sexy. Best looking female Daemon ever.

Spoiler:

Guilliman punching out the head of a Word Bearer.
It is hard to get a sense of scale, but I find it fun.

Spoiler:

 ThePrimordial wrote:

Alpharius is not slightly bigger. Your estimates don't even account for an increase in size there but whatever. Alpharius is the height of a very tall astartes or custodes. He's like 9 feet tall.

That´s what I meant by "slightly bigger". They were supposed to be able to disguise as an Astartes.

I don´t know where did you get the Alpharius is 9 feet tall. If he were 1-2 feet over an Astartes, then no way he could be mistaken with one.

The average astartes is 8 feet tall. Do you really think there can't be a 1 foot differential?
Constantin Valdor, the hero of the custodies was the height of Alpharius.


Automatically Appended Next Post:

 CthuluIsSpy wrote:
Wait, I'm confused. Which image are you talking about?

The one you gave with Horus, Sanguinius and the Emperor.
Horus stands 8.5 inches tall at the head, and Sanguinius measures 5.5 inches from his head to the end of his feet.
Told ya.


Automatically Appended Next Post:
Magnus 11 feet tall......
Have you seen the cover art of A Thousand Sons?
Look at the space marines at the very back where Magnus is.
They come up to his thighs while he's doing some kind of bizarre kneel (or on far lower ground then the astartes) and it takes 3 lined up side to side to obscure his thighs.

The Primarchs were massive. Around a meter taller (So around 3.3 feet) taller than an Astartes would be my estimation.

Assuming average. They varied in size after all.

Wow I just remember the Unremembered Empire:

OMG they are like 12" perhaps bigger. That or the two guys in front are midgets.

This was actually from a topic posted here on Dakka: http://www.dakkadakka.com/dakkaforum/posts/list/90/516655.page

 ThePrimordial wrote:

The average astartes is 8 feet tall. Do you really think there can't be a 1 foot differential?

Of course I do. He was supposed to of a similar size. If he was 1 foot bigger, he would have been spotted easily.
7,5" feet for Astartes and 8" for Alpharius sounds fine.

Constantin Valdor, the hero of the custodies was the height of Alpharius.

Source? I thought Valdor was the size of your average Primarch

Valdor, The Emperor and Jenetta Krole:

I hear that SM came up to the average primarch's chest.