I've never seen one
Je n'en ai jamais vu un comme cela.
I've never seen one like that.
Je n'en ai jamais vu d'aussi jolies.
I've never seen one so pretty.
I've never seen so many.
Je n'en ai jamais vu un de près.
I've never seen one up close.
I've never seen one in real life.
Je n'en ai jamais vu comme ça.
I've never seen anything like it.
I've never seen one.
Je n'en ai jamais vu d'aussi gros.
I've never seen one that big.
En fait, je n'en ai jamais vu.
Actually, I’ve never seen one.