Fun-Filled Assorted Colors Gecko Light-Up Pen Party Favour, Plastic, 6" These lizard pens have the tail of the lizard as the body of the pen and ballpoint tip while the head is at the top of the pen which lights up with a simple click. Comes in 4 different designs. Each pen measures 6 5/8" x 2 1/2". Package includes (1) pen.