fit in with
phr. v..phr. v.. to be similar to or match other things or people in a group so that you belong there.
phr. v.. to be socially compatible with a group or to be consistent with a set of plans, ideas, or circumstances.
He tries hard to fit in with his new colleagues.
The new sofa doesn't really fit in with the rest of the furniture in the living room.
The proposed legislative changes do not fit in with the government's long-term strategy for economic recovery and social stability.
usually followed by a group of people, a style, or a pre-existing plan.
contrast with the intransitive 'fit in' (to belong); adding 'with' allows the speaker to specify the exact group or environment being matched.
She fits in to the group.She fits in with the group.while 'fit into' is used for physical spaces or categories, 'fit in with' is the standard phrasal verb for social or conceptual harmony.