In Ruth, Eastman Johnson presents a portrait of a young woman with a serene expression. The colors are soft, featuring warm tones of browns and creams, which highlight her delicate features. She is dressed in a simple yet elegant gown, with her hair styled modestly.

The background is a muted green, drawing attention to her figure and expression. The painting is executed in oil on canvas, a medium that allows for rich texture and depth. Johnson's technique showcases fine brushwork, particularly in the rendering of the woman's skin and fabric. The dimensions of the painting are approximately 76 x 61 cm, making it a sizable portrait.

The realism in the work captures not only the likeness of Ruth but also her character. Eastman Johnson was known for his portraits and genre scenes, often depicting American life in the 19th century. Ruth reflects his skill in portraying individual personalities with sensitivity. An interesting fact about this work is that it may have been inspired by the artist's own experiences and observations of women in his community.

Johnson's focus on realism set him apart from many of his contemporaries.