In Sleeping Baby, Armand Guillaumin captures a tender moment of a baby peacefully asleep. The soft color palette features gentle pastels, primarily blues and pinks, which create a calming atmosphere. The baby's delicate features are highlighted, emphasizing innocence and tranquility.

The background is minimal, allowing the viewer to focus entirely on the child. Guillaumin employs oil on canvas for this work, a medium that allows for rich texture and depth. The brushwork is loose and fluid, characteristic of the Impressionism style, giving the painting a sense of immediacy. The light falls softly on the baby's face, enhancing the overall warmth of the scene.

The dimensions are approximately 50 x 70 cm, making it a modest-sized portrait. Armand Guillaumin was a key figure in the Impressionist movement, known for his vibrant use of color and light. This painting, created in the 1890s, reflects his ability to convey emotion through simplicity. Interestingly, Guillaumin was also a close friend of Vincent van Gogh, and their artistic exchanges influenced both of their works.

Sleeping Baby stands out as a heartfelt representation of childhood innocence.