In Ulf, Carl Larsson presents a warm and intimate portrait of a young boy. The colors are soft and inviting, primarily featuring warm tones of browns and yellows. Ulf's expression is one of innocence and curiosity, drawing the viewer into his world.

The background is simple, allowing the focus to remain on the boy's face and demeanor. The painting is executed in oil on canvas, a common medium for Larsson's works. The brushwork is smooth, contributing to the lifelike quality of Ulf's features. The dimensions of the painting are approximately 60 x 80 cm, making it a manageable size for personal viewing.

The attention to detail in Ulf's clothing and hair showcases Larsson's skill in capturing the essence of childhood. Carl Larsson was a prominent Swedish painter known for his depictions of family life and childhood. Ulf is particularly interesting as it reflects Larsson's deep affection for his own children, often serving as inspiration for his art. This work exemplifies the Realism style, focusing on everyday subjects with a sense of warmth and familiarity.

Larsson's ability to convey emotion through his subjects has made him a beloved figure in Swedish art history.