https://www.youtube.com/watch?v=HSWoINNQRbM

Random practice with my knight race by making a couple of generic samples. First time with a female knight.
The only feature that's locked to a specific sex is the female's mouth; it isn't as "fangy."
Males obviously have broader builds while females have more slender ones.
As for their height differences, there is a much smaller gap between the two sexes compared to humans, with male knights averaging at ~6"1ft (~1.85m) and females at ~5"11ft (~1.8m)

More details on knights:

Physically, they sorta have this exoskeleton thing goin' on and they resemble suits of armor, thus how they got their name. Their most distinct features are their helmet-like heads fancied up with some spikes or horns and a plume. The torso is very defined, resembling that of a well-built human. Out-of-shape knights have their exoskeletons stretched (for the fatties) or shrunken (for the scrawnies) but overall still keep that well-built look, and yes, they do molt. Think of them as bugs, without actually being a bug.
Their exoskeletons usually take muted earthy or metallic colors while their plumes are sometimes a bit more vibrant. Their eyes glow faintly and also come in a variety of brighter colors. Hands come with three digits and a thumb while their feet don't come with any digits, having a very "boot-like" appearance.

Lore-wise, for tabletop roleplay purposes, knights normally live near canyons, mountainous areas, caverns, and deserts and are very in-tune with the element of earth, and have a few racial spells unique to them revolving around said element as well as some healing and support. They're hardy, able to resist sickness, poisons, and exhaustion easily, but they aren't very dexterous and usually fumble with delicate work that requires nimble hands. Knights are usually loyal and fearless and can be quick to make allies with if they share a common goal. Regarding classes, Knights are commonly known to be Fighters, Barbarians, Clerics and sometimes Wizards, while other classes are more rarely seen.

Anything is subject to change, but for now I'm happy with what I got for the race.