Demi vs moitié

I've been reading through the lesson and discussion comments to try to understand some of the subtle differences.

In English, if I go to a bakery and ask for "half a baguette", I'm asking them to take a full-size baguette and cut it in half. If I want a small but uncut baguette, I'd have to ask for "a half-size baguette" or a "mini-baguette".

I think the comments are saying that in French, "une demi-baguette" can mean either an uncut half-size baguette or half of a full-size baguette. Is that correct?

Thanks!