made for each other
cliché Ideally suited for each other. Typically refers to a romantic couple. I've never seen a happier couple than Tom and Anna—they're made for each other!
made for each other
[of two people] very well suited romantically. Bill and Jane were made for each other. Mr. and Mrs. Smith were not exactly made for each other. They really don't get along.
made for each other
Also, made for one another. Perfectly suited, as in Pat and Peter were just made for each other, or, as Samuel Richardson put it in Clarissa (1751): "Her features are all harmony, and made for one another." The use of made for in the sense of "fitted for" dates from the late 1100s.
(be) ˈmade for somebody/each other
be completely suited to somebody/each other: Jen and Alan seem made for each other, don’t they?