Jeune fille assise features a young girl seated against a muted background. The colors are soft, with a palette dominated by pale blues and warm earth tones. The girl's expression is contemplative, and her posture suggests a sense of introspection.

Spilliaert's characteristic use of light creates a gentle glow around her figure, enhancing the mood of the painting. The painting is executed in oil on panel, a medium that allows for fine detail and rich texture. Spilliaert employs a Symbolist style, characterized by its focus on mood and emotion rather than realistic representation. The brushwork is delicate, with smooth transitions between colors that create a sense of depth.

The dimensions of the work are approximately 50 x 70 cm, making it a modestly sized portrait. Léon Spilliaert was a Belgian painter known for his Symbolist works that often explore themes of solitude and introspection. This particular painting, created around 1905, reflects his interest in the psychological depth of his subjects. Spilliaert's unique approach to light and color sets him apart from his contemporaries.

An interesting fact about this work is that it captures the essence of youth and contemplation, a recurring theme in Spilliaert's oeuvre.