It's watercolor, 8 x 10, Arches cold press with a touch of colored pencil here and there to finish. Three colors used, all Winsor & Newton - Ultramarine Violet, Permanent Rose and Winsor Lemon. The scan has obliterated some detail in the eyes.
When I do these portraits, I often do a small (5 x7) color and pattern study concurrently to help me work out the details. That's here: