8.5" x 11"
Of course bulls were a favorite subject of Picasso's. Picasso was born and studied for awhile in Spain.
This is from Sketchbook # 105, 11 x 17 cm (about 4" x 6"). He used a wide variety of sketchbooks; he kept a small one with him when he was out, and used a large one in his studio. I'm in good company.
This may be the last drawing copied from his sketchbook that you'll see here.