Hello Catapi,
for now, we don't plan on having sliders for making your body bigger or smaller, but you will have many features to change, like different faces, horn styles, tattoos, beards, earrings, hairstyles, the color of hairstyle and eyes. You will also have different body types which are predefined.
Thanks for answering, Mihaylov!
you said there'll be different body types. it's planned to have a number of predefined body types for each race? (3 body types each, for instance)