In Portrait of Frederik-August Graf zu Rantzau as a Child in a Sailor’s Suit, the young boy is depicted wearing a classic sailor suit, which is characterized by its navy blue and white colors. His expression is a mix of innocence and curiosity, drawing the viewer in. The background is softly blurred, allowing the focus to remain on the child.

The use of light highlights the boy's features, enhancing the overall warmth of the portrait. The painting is executed in oil on canvas, a medium that allows for rich color and texture. The artist employs a realistic style, capturing the details of the sailor suit and the boy's delicate features with precision. The brushwork is smooth, contributing to the lifelike quality of the portrait.

The dimensions are approximately 60 x 80 cm, making it a moderate-sized piece that invites close viewing. Philip Alexius de László was a prominent portrait painter known for his ability to capture the essence of his subjects. This particular work showcases his skill in portraying children, a subject he often approached with tenderness. An interesting fact about this painting is that it reflects the fashion of the time, where sailor suits were popular among young boys, symbolizing innocence and adventure.