The DuckDuckGo app just erased all my progress on writing this because I kept leaving the app to check spellings of words, so I am a little angry right now. And since the app prevents me from using the speech-to-text function for some stupid reason, I have no way to bubble check spelling without leaving the app, which I can not do. So expect spelling errors.
So I've been banned because of the unclarity the thin_calves tag, so I guess it is necessary to develop the wiki.
I believe these to be the offending edits: post #4893604 post #4617980
I was said to be suspended for tagging "thick thighs and thin calves on posts wher the legs literally the width all the way down" which describes neither of these posts. But there the only ones I could find that be mistaken for that, so I'll use them as examples.
In the first one the gastrocnemius area (gastrocnemius appears to be the name of the muscle that is on the back of the calf, I don't know any better names for this lump on the back of the calf) does make the calves appear as thick as the thighs, but the main calf is still visible, and there is still a noticeable taper downwards, so I would count it as thin. Unless the gastrocnemius area is hyper big, if the heel is thin and the main part isn't completely covered in fat and/or muscle the I would argue it is thin.
Same goes for the second post, but the tapering is less noticeable, but the distinction between the gastrocnemius area and the rest of the calf is more noticeable.
I've been ablieing the tag to calves that are just average so far, but I can see an argument for having a sprit medium_calves tag.
Some rules of thumb:
The calves are usually thinner then the thighs. So just because the thigh is thin that doesn't mean the calf is too.
Despite this, if the thigh is thin enough and the calf is behind the thigh, then it is safe to assume that the calf is thin too. And vice versa is true too.
If the leg tapers downward, then the calf is probably thin. Though it is technically possible for both the thigh and the calf to be thick while the leg tapers down, but this is rare. I have yet to see an example of this.
It makes sense that the calf would be the same width as thigh at the nee, as they are connected at the nee, but that doesn't mean the calf is thick when the thigh is. It is important to look at the heal and front portion of the calf too.
The gastrocnemius area on the back of the calf might add some girth, but if the rough shape of the calf's bone is visible, then it might still have a thin impression. This is a gray area.
Updated