In Portrait of Justus Suttermans, the viewer sees a man dressed in elegant attire, showcasing rich colors like deep reds and golds. The background is dark, which enhances the figure's prominence. Suttermans is depicted with a serious expression, suggesting a sense of dignity and importance.

The use of light and shadow adds depth to the painting, typical of the Baroque style. The painting is executed in oil on canvas, a medium that allows for rich color and detail. Van Dyck's technique includes smooth brushwork and a keen attention to textures, particularly in the fabric of the clothing. The dimensions are approximately 80 x 100 cm, making it a sizeable portrait.

This work exemplifies the artist's skill in portraying character and status. Anthony van Dyck was a prominent Flemish painter known for his portraits of royalty and nobility. This particular portrait of Justus Suttermans, a painter and art dealer, reflects the artist's ability to convey personality through facial expressions and attire. An interesting fact about this work is that it was created during Van Dyck's time in England, where he became the court painter for King Charles I.

The painting remains a significant example of Baroque portraiture.