6.5x6.5 inches. Gouache on black paper. 
 
I found my old Nintendo DS I used to play around with about 15 years ago. I downloaded a program that let you draw and paint on it, so that was an early version portable digital painting for me. I also found an old Final Fantasy VI cartridge in it - my all-time favorite video game!! No other game has gotten close to taking so many hours of my life 😝