Only one guy on here has two eyes, and even then, they're fake eyes. It's big-tits-McGee, Mr. logic man extraordinaire, Geneva Suggestion Believer himself: Shockwave! Yep, all 12 of him, a reasonable amount of alternates to have, unlike some people... Shockwave Height Chart, everyone, fuckin wee.
Edit: I didn't like the old scaling I had so I changed it. The old chart is at the end of this post.
Edit 2: I HAVE FOUND CONFIRMATION OF BV SHOCKWAVE'S HEIGHT I KNOW HOW TALL THAT FUCKER IS NOW
Quick Disclaimer, if any of the images look weird, it's because I had to stitch a few separate images together to create a full body shot of the character.
Here are links to my Bumblebee Chart, my Optimus Chart, my Megatron Chart, and my Soundwave Chart. !!NEW!! -> Ratchet & Ironhide. Please go gawk at how many Optimus designs there are, sweet fuck, there are so many. For future reference, all these charts will be filed under my "Transformers Height Charts" tag and my "aka the adventures of a..." tag.
Master Post
Explanations and Sources below the cut.
Unicron Trilogy Energon - ~14 feet 3 inches (No actual source, and Energon doesn't have any listed heights anywhere. For the uneducated, the Unicron Trilogy has given each of its 3 seasons separate names and 3 separate art styles. This is the design used in Energon (S2) though he only shows up in Energon. I was able to compare him to Optimus, and using Cybertron's listed heights, I got this number. I am in physical pain, it does not get better from here. Hilarious side note, his Japanese name is Laserwave, which contains the missing "wave" of Shockwave in this iteration's name.)
Earth Spark - ~15 feet (No actual source for ES, but using a barn door to get Bumblebee's height, then Optimus's, then Megatron's height, I was able to make a guess at Shockwave's. Shockwave comes up to about Megatron's chin; I lost the screenshot I used. It's so convoluted, I know, but it's all I have, also, tiny universe, everyone is so small)
TFA Longarm/V1 - 15 feet 2 inches (Animated has no actual numbers, but the lovely @phoenix-inanis has provided a frankly astounding resource with their own calculations for the heights of all the TFA characters. Go look at it, it's wonderful -> https://phoenix-inanis.notion.site/TFA-Height-Chart-f6ad2960ca8c4c5b859ee4958723aaa4?pvs=4)
Gen 1 - ~18 feet (TFWiki, uuuuh I've got nothing to add)
Netflix Cybertron Trilogy - ~18 feet (I have no source for this, other than assuming that because this design is identical to Gen 1, they are the same height. That's it, really)
Knight/Capel-Verse - ~18 feet (No source, and he never stands next to anyone I can measure him against, but because the TFOne director has said that this movie is both canon to the LA movies and its own separate canon, I am assuming the height I figured out for TFOne applies to this universe as well. Until proven otherwise. Capel directed the ROTB movie if you're wondering why his name is there)
One - ~18 feet (No source, I got this number by comparing him to Optimus. Now, I am aware of the TFO heights listed on the wiki, but I reject those numbers on principal. A: Those numbers are sourced from the Walmart Promotional AR Experience that came out before the movie. B: There are three decimal points, and that number does not convert into a whole number in meters (which is originally what I thought was weird about it). C: The director has said that this movie is both canon to the LA movies and its own separate canon, so I have elected to use the few given heights we have from KCV and worked from there. My Optimus post has slightly more context if you want it)
Cyberverse - 20 feet (This comes from a screenshot of this video which has the Cyberverse height chart everyone uses, though the quality of the screenshot is iffy.)
Aligned Cont. WF/FOC/TFP - 26 feet 2 inches (This number comes from Fandom and I completely believe it, even if they don't list their source, because the entirety of this universe is freakishly tall. Go look at my other charts, all the ALC designs are monstrous compared to the others)
TFA V2 - 29 feet 11 inches (Once again, phoenix-inanis did a fuck ton of work, go look at it, it's wonderful -> https://phoenix-inanis.notion.site/TFA-Height-Chart-f6ad2960ca8c4c5b859ee4958723aaa4?pvs=4)
Bayverse - 32 feet (Thank you @enokv, for linking me to a scan of a Bayverse data booklet, I owe you my life.)
And that's it. I didn't have to leave any designs out, all of them are included here (hopefully). It was so nice to work with a character where I wasn't drowning in 20+ designs across every goddamn universe.