In Courrier français, Jules Chéret uses vibrant colors to depict a lively scene. The poster features a central figure, a postal worker, surrounded by various postal elements. Bright reds, yellows, and blues dominate the composition, creating a sense of energy and movement.

The background is filled with stylized designs typical of the Art Nouveau style. This lithograph showcases Chéret's skill in poster design, characterized by bold outlines and dynamic forms. The use of color is striking, with a harmonious blend that draws the viewer's eye. The intricate details in the clothing and background elements reflect the meticulous craftsmanship of the period.

The artwork measures approximately 60 x 90 cm. Jules Chéret was a pivotal figure in the development of the poster as an art form. He is often referred to as the 'father of the modern poster.' Courrier français is a prime example of his work, capturing the essence of French culture and the importance of postal services in the late 19th century. This piece exemplifies the Art Nouveau movement's emphasis on decorative arts and organic forms.