It`s not just about looks, it`s about the health as well. Was she checked for any hereditary diseases? In my opinion what you could do is try and show her for a while and then you`ll see if she`s a breeding material...... and also as someone mentioned, the size also matters as there is quite possible that a really small female might have problems while giving birth. That`s why breeders usually use slightly bigger females and smaller males for breeding.
All the best!