In Frank Billings Kellogg, the viewer sees a dignified man dressed in formal attire. The colors are rich, with deep blues and warm browns dominating the palette. The background is softly blurred, focusing attention on Kellogg's face and expression.

His gaze is direct and confident, suggesting a person of importance. The painting is executed in oil on canvas, showcasing de László's skill in capturing realistic textures. The brushwork is detailed, particularly in the rendering of Kellogg's suit and facial features. The dimensions are approximately 76 x 102 cm, making it a substantial portrait.

The lighting is carefully managed, highlighting the contours of Kellogg's face. Philip Alexius de László was known for his portraits of prominent figures, and this work exemplifies his style. Kellogg was a notable American politician and diplomat, serving as a U.S. senator and Secretary of State.

This portrait was likely commissioned to commemorate his achievements and status. De László's ability to convey personality through his subjects is evident in this work.