In Reinerbub (Bildnis Herbert Reiner), we see a young boy, Herbert Reiner, depicted with striking colors. The background is a blend of muted tones that contrasts with the vivid hues of the boy's clothing. Schiele's characteristic lines create a sense of movement and emotion in the figure.

The overall composition draws the viewer's attention directly to the subject's expressive face. The painting showcases Schiele's signature style, characterized by bold lines and a vivid color palette. The use of oil on canvas allows for rich textures and depth in the portrayal of the figure. Viewers can observe the intricate details in the boy's facial expression, which conveys a mix of innocence and introspection.

The dimensions of the painting are approximately 60 x 80 cm, making it a medium-sized work. Egon Schiele was a prominent figure in the Expressionist movement, known for his raw and emotional style. Reinerbub was painted during a period when Schiele was exploring themes of youth and identity. An interesting fact about this work is that it reflects Schiele's unique ability to capture the psychological depth of his subjects.

This painting is part of the collection at the Belvedere Museum in Vienna, Austria.