Although size and proportions vary greatly amongst individual Kimet, the underlying structure is incredibly consistent [as one would expect of skeletons]. The largest range of variety occurs in the skull/beak, finger positioning/fusing and spine/tail length.
Compared to mammalian physiology, Kimets are incredibly 'delicate' in relation to their size. That being said, what they lack in strength is compensated by increased dexterity [in all four limbs] and endurance.