mix-and-match

[miks-uh n-mach] /ˈmɪks ənˈmætʃ/
adjective
1.
made up of complementary elements taken from different sets or sources:
a mix-and-match approach to interior decoration.
verb (used with object), verb (used without object)
2.
to combine in a harmonious or interesting way, as articles of clothing in an ensemble.
Contemporary definitions for mix-and-match
adjective, noun

put together or coordinated according to taste, combining different but complementary items; also written mix and match