Emaciated: Extreme thinness from absence of body fat and lack of muscle — a character that is essentially "skin and bones", skinny to an extreme and, oftentimes, unhealthy degree. An emaciated character's ribs or entire rib cage will be visible under their skin, their pelvic bones may be visible as well, their abdomen concave, and their limbs thin and bony; the character's cheeks and eye sockets may even be concave.

Skinny: A character with a narrow, thin figure; who has no notable excess body fat and lacks particularly defined muscles.

Slim: Possessing a naturally petite, narrow body frame that is neither muscular nor overweight.