Ooh. Worldbuilding! Read the desc in the previous post too.

It's a bit of a trip to justify a kooky low-grav setting for idealised flabby fun and mobility at higher weights/making it so that it's only really pure size that limits an individuals' motion, isn't it?
The tug of war between abject realism and fantasy.
But it's good and sometimes oddly fun detail to get into, especially when you really get into making it your ideal setting.

Demihuman is a classification I've seen commonly used for humans with animal features where the features are meaningful/a matter of blood and breeding, and not just "Oh, this character can be likened to a cat because they're fickle and mischievous wahaha~".
Though that then does carry the unspoken tone of "human but not" which could be interpreted as "human but lesser".
And different settings have different definitions of demihuman. Like Elden Ring for it's multiple conventionally unflattering examples.

Beastkin is another, though I've seen that used equally in reference to the archetypal catgirl, to something like Felicia, to something like an anthro cat.

Pie chart of the proportions... Like as in how many people per race are mesomorph, endomorph, and ectomorph?
Or did you mean it as like a picture chart showing a generalised minimum and maximum for how tall/wide each race gets, not including outliers who are just extra smol/extra tall/extra wide even by comparison?

Or am I misreading that entirely and you meant it as in how many people in the city population make up each race?

yeah the point about the gravity i think was inspired by some documentary i saw long ago that said you didnt need full earth gravity to avoid bone loss or some of the other ill effects,it might have been one about settling mars,its been years so i dont remember,but it feels plausible enough to be at least one of the factors facilitating the kink aspects,since alot of the hard sci-fi of the setting it mostly me working backwards from the kink side of things to facilitate it,dont know if it makes it any more plausible but it makes enough sense in my head i guess plus alot of the very core of this thing was made up duirng highschool so its not like this is going to be high-literature or anything,over time its gotten better and dropped some things.

for a long time i struggled with an original name for the midpoint between human and anthro,nekomimi or other japanese terms were fairly accurate but i didnt want to use a purely japanese term even if in the earliest incarnations of the setting it was very weeb-centric,demi-human definately was considered at one put but you described the problem in that it implies they are lesser than humans,and thats not a vibe i wanted in my setting,i didnt want any variant of humanoid inherently superior to another for the most part.beastkin kind of had the same problem in that it somewhat implies that they are less civilized or some such,ended up with "featured-human" from how ive labeled characters on my ref sheets as "human with x-animal features" and it just kinda sounded alright to me,they arent better,just humans with different features.
In some earlier versions of the setting i had the eats an tails being a main conduit of bio-tech interface or similar functions,but i think ive dropped that since it would make featured-humand and anthros inherently better than humans and i dunno if i could make the whole "plug the USB into your ear to transfer payment" kind of thing work in a satisfying way.

As for the pie charts i mostly just wanted to give an idea how the proportion of the different races amoung the populace on average rather than which body types or minimum/maximum sizes for anything,i like to leave open the possibilities of things outside of whats outright stated both for inclusion purposes and to allow for unique individuals or just keeping the door open for other types of characters to exist in the setting if needed without breaking the rules outright,im not sure if i want to define the method characters from other settings or other persons OCs that otherwise wouldnt fit in the setting come to be able to exist in it (wacky time travel,dimension slips,accidently getting thanos'd,etc) but i like to leave the possibility there.

im still working on the next bit which i think would be considered the "fun" part,just waiting for some feedback from friends on some things and then i gotta actually draw something up for it,hopefully i dont drag my ass on it too hard and some people at least find it interesting.