The Choedan Kal are two large statues that are the focus of the One Power in the Wheel of Time series, both of which were mostly buried. Is there any specifications on their heights? Every wiki I've found says "massive" but did they ever give anything more specific, or relate it's height to anything in the surrounding area? Like "It was as tall as the nearby trees" or "a finger was each a man tall"?
I wasn't able to find a total height in the book, but we do have a measurement to work with.
Out of the clay at the bottom of the pit slanted a gigantic stone hand holding a crystal sphere, and it was this that shone with the last sunlight. Rand gaped at the size of it, a smooth ball—he was sure not so much as a scratch marred its surface—at least twenty paces through.
Some distance away from the hand, a stone face in proportion had been uncovered. A bearded man's face, it thrust out of the soil with the dignity of vast years; the broad features seemed to hold wisdom and knowledge. -The Great Hunt
Length, units of: 10 inches = 3 hands = 1 foot; 3 feet = 1 pace; 2 paces = 1 span; 1000 spans = 1 mile; 4 miles = 1 league. - Appendix
The average US male has a hand length of about 7.5 inches(19cm), and a height of 70 inches(178cm).
With some guess work on how long the hand is vs the sphere itself, math blah blah blah.
If the length of the hand is 60 Wheel of Time feet (20 paces at 1 pace = 3 Wheel of Time feet) using our average proportioned US male ratio,
the Choedan Kal stood at about 560 Wheel of Time Feet or converted from Wheel of Time measurements 467 US Feet(142 meter).
As a basis for my assumption that the hand is about the same diameter as the orb here is the official cover for Winters Heart. As Muru states in a comment, The access Ter'angreal (which is what it appears we see in the book cover) are identical but miniature of the large Sa'angreal.
The best place to check is Book 2, Chapter 20, when Rand first sees the male Choedan Kal statue. At this point neither Rand nor we the readers know what it is, or even the words Choedan Kal - it's just a big statue to us, and for that reason it's described in more detail than later.
His eyes on the reflection, he was surprised when Red suddenly stopped. On the point of urging the bay on, he realized that they stood on the edge of a clay precipice, above a huge excavation. Most of the hill had been dug away to a depth of easily a hundred paces. Certainly more than one hill had vanished, and maybe some farmers' fields, for the hole was at least ten times as wide as it was deep. The far side appeared to have been packed hard to a ramp. There were men on the bottom, a dozen of them, getting a fire started; down there, night was already descending. Here and there among them armor turned the light, and swords swung at their sides. He hardly glanced at them.
Out of the clay at the bottom of the pit slanted a gigantic stone hand holding a crystal sphere, and it was this that shone with the last sunlight. Rand gaped at the size of it, a smooth ball — he was sure not so much as a scratch marred its surface — at least twenty paces through.
Some distance away from the hand, a stone face in proportion had been uncovered. A bearded man's face, it thrust out of the soil with the dignity of vast years; the broad features seemed to hold wisdom and knowledge.
The statue's hand is holding a ball which is twenty paces (around 600 inches or 50 feet) in diameter. Now we don't know exactly how big the ball is compared to the hand, but I'm assuming the hand is firmly clasping the ball, something like this (non-canonical) picture:
At a rough estimation, I guess I could comfortably hold a ball perhaps 4-5 inches in diameter like this. That would make the statue around 120-150 times life size, assuming it's proportional. So the statue is, at a very rough estimate: