Add some style to your stationery with POP! Pen Leonardo! This POP! Pen is perfect for jotting down all your ideas at home or on the go. Expand your Teenage Mutant Ninja Turtles lineup by adding this writing staple to your collection. POP! Pen is approximately 6 in (15.2 cm) tall and contains green ink. Vinyl pen topper is approximately 1.3 in (3.3 cm) tall.