huh so dog-sized unicorn with the power to move

Let’s also assume that all apples are exactly the same size, especially between different worlds. >_<

MFW  

“Twilight has tall proportions”
 
“Every character has tall proportions”  
FTFY

Pinkie Pie mentions both centimeters and inches in “Griffon the Brush-Off.” Jsyk.

@Jack Kellar  
According to my calculations, the average Equestrian apple has a diameter of 13.64 cm or 5.37 inches.

@zekrom  
I always figured that they’d be the size of a small melon… or in the case of a fanfic I’m writing, an average watermelon.
 
You can guess how the size difference works in it :P

The explanation for this discrepancy is very simple: Equestrian apples are bigger than human world apples. Problem solved.

As Techy noted, Equestria Girls are not human shaped. Using them as proxies for real-world humans in a size comparison makes as little sense as assuming that My Little Pony characters are actually pony-sized. (The portal also transforms things that cross, making interdimensional size comparisons untenable.)
 
@ze  
The entire point of putting human languages in Equestrian mouths is that the words mean the same thing, so that the audience understands them. Twilight is not speaking a special language wherein measurements are different.
 
The candy cane is the most coherent size piece I’m aware of. The artists were (presumably) told to create a roughly eight foot candy cane, as dictated by the script, and drew that at a size that seemed credible compared to the two fillies next to it.
 
(Of course, sizing in FiM is not altogether consistent, and the character designs are cartoony enough that you’d want to adjust them before putting them alongside humans anyway.)

@ze  
I may look into that, but as far as anyone should be concerned they’re whatever height you want them to be. (For me that’s between 3’3” and 4’)
 
For starters I bet the animatics had no concern for giving us their height but rather made things reasonably sized in equestria girls such that an apple seems like the right size for an apple, a door way is tall enough that people can walk under, the crown fits atop an EQG head, a bunny still seems about the size of a bunny etc. If one does decide to do a comparison all it will give you a pony:EQG ratio which means nothing. We aren’t skinny, big headed EQG style beings with pastel skin. The head size comparisons will probably give you identical results to comparing crown size because I bet you they made all relative sizes such that the crown works on ponies and “humans”.
 
Sometimes people (myself included) need to just remember it’s fiction and if something is not revealed and likely won’t be, whatever you want it to be might as well be true. If you want to argue with someone about why your dimensions are correct while theirs are wrong so be it, but it’s useless,

@Silver Strength  
AGAIN: the Equestrian foot probably doesn’t equal the human foot. For all we know, 1 Equestrian foot = 6 inches. That very well might be an 8 Equestrian foot candy cane while only being 4 feet tall.
 
There is ONE measurement system that is close to infallible for finding a PROPORTIONAL size between the Equestria Girls and the ponies, one which should exist but I can’t seem to find.
 
I give to you…
 
THE BIG CROWN THINGY SCALE.
 
The big crown thingy is the ONLY thing that seems to stay the same size before and after entering the portal. We find the ratio between the ponies and the crown and between the humans and the crown and we can get a fairly accurate approximation to how big these little ponies actually are. Sure, it won’t give us actual units, but a scale comparison is good enough for now.

@ze  
The candy cane estimate is certainly not exact. But it’s hard to believe that Twilight would see Scootaloo (a filly of known size she’s seen before) next to a five foot candy cane and think it’s eight feet tall.
 
Apples, on the other hand, don’t have anything resembling a consistent size, so any measurement based on apples has a huge margin of error. (The cleverer Equestria Girls measurements that I’ve seen use Angelbunny, since he appears as a bunny in both settings, or note the comparative sizes of Twilight’s EqG head and pony head when she sees her reflection. However, given that critical details like character age don’t line up, I’m inclined to dismiss any physical data drawn from the alternate universe.)

The simple fact the candy cane is curved makes it impossible to accurately calculate anything, anyway. Apples can vary widely in size, and so do the ponies in the show (there are HUGE inconsistencies in size, especially among everything that’s not an adult mare, and depending on posture).  
And even then, the EQG characters are pastel humanoid thingies, and definitely not ‘humans’ as we know them. I’m guessing they’re roughly the size of an actual human but still. Hell, Twilight’s ‘heels’ are taller than an apple.

Pretty sure someone mentioned this before, but the candy cane measurement is based on, more or less, an approximation.
 
Unless you are Jamie Heinemann, it is unlikely that you can give an exact measurement of something by just looking at it.
 
ALSO: the foot was at one point based on human body size. If we were to infer that the equestrian foot had a similar origin, it is likely that the equestrian foot and the human international foot are not equivalent due to differing body size of the two species.

@Techy Pony  
I meant as in “way bigger than a 6ft tall student”.

@Jack Kellar  
A standard door is 6’8”, why would someone who is 5’5” need to duck?

@Techy Pony  
If they were that big, they’d have to duck to fit through doors.

@Jack Kellar  
Celestia is probably taller than average, maybe Luna as well. The average though for an adult female is roughly 5’5” so they definitely shouldn’t be taller then that if they’re just highschool students.

@Nosfrat  
Besides, high school student. If she were 6’, what would that make Luna, let alone Celestia?

I stopped reading at “let’s assume she’s 6ft”. Just because you’re anorexic doesn’t mean you’re any tall, even though you look taller.

Twilight Sparkle, six feet tall? Heh.

I prefer the left one. Fewer assumptions, and a more reasonable conclusion.

@Background Pony  
Even if they are the same there is no way of knowing their size without either comparing it to something else of known dimensions (in which case cut out the middle man (apples) and just compare the ponies to said object) or assuming they decided on a size for the ponies and were bored enough to scale everything in their world to the same relative size (which they didn’t). There’s also nothing saying they’ll be the same size from one scene to the next even if any given frame they’re all the same size.

@Mad Black  
They’re cartoon apples which come all from ACME.  
So THEY ARE the same size!