Barker Creek’s Idiom Grammar Poster is one of the nine posters in the Grammar Poster Set. This beautiful poster clearly defines the term “idiom” and reinforces that definition with numerous examples. We consulted with numerous “grammar geeks” and educators when developing our grammar posters including the director of one of the largest ESL programs in the country and two college professors. This poster measures 13 3/8″ wide x 19″ high and is printed on sturdy 12pt cardstock. Coordinating products available: Search Barker Creek Grammar.