Guildford?

Fiona may be 18 but she barely looks it.
Shouldn't that be she barely looks like one?

Does the "she barely looks it* make sense

thanks

Yes.

Do we get a photo of this bare 18 year old Fiona or am I on the worng shelf of the internet?

You could make the meaning clearer by saying "Fiona bare, hardly looks 18"...

Harrumph. This is not the Phrase Finders I know. On the other hand, we quote e.e. cummings: "A pretty girl who naked is, is worth a million statues."

To answer the original question: the quoted sentence means that Fiona looks very young, perhaps younger than 18.

As Ms. Berg says, "barely" here means "scarcely" or "only just".

it's not fair - stimulating the imagination that way.

...and that after me having seen a convertible with a striking dark-haired woman - Number plate? "I Dyd" !!!
(absolute truth! Near Guildford yesterday)

That's just down the road from me (the A3 to be precise). Was she mad? It was bloody chilly yesterday.