1
general::
Large and striking, as in His ties tended to be big and bold in color and pattern, or This big and bold design for a book jacket is sure to catch the casual browser's eye. This phrase, used mostly to describe things rather than persons, is a kind of visual analog of LOUD AND CLEAR.
American Heritage Idioms
2
general::
Phrase(s): big and bold
large and capable of getting attention. (Usually refers to things, not people.) • The big and bold lettering on the book’s cover got lots of attention, but the price was too high. • She wore a brightly colored dress. The pattern was big and bold and the skirt was very full.
McGrawhill's American Idioms And Phrasal Verbs