Discover the Instruments of the Orchestra - 24 Posters & Fun Facts. Brighten up your music room with these attractive full-colour laminated 9" x 12" posters featuring the instruments of the orchestra. Each instrument in the four orchestral families - strings, woodwinds, brass, & percussion - is featured on the front of the poster while the back includes history of the instrument, "fun facts" & representative musical works featuring the instrument.