Forgive me for being vulgar,
But I've always wanted a Baignoire timepiece.
Might I see it?
Oh, I-I don't have it on. I brought it in to be resized.
Does "Bring in" is a phrasal verb here or "in" means inside or into a building?
Into the building - or rather into the commercial environment where it could made smaller or bigger to fit a new user (or a user whose shape has changed).
b
If the speaker did not bring it in to the building in which s/he is standing at the moment of speaking, then 'I took it in' would be more natural than 'I brought it in'.