The Artgame 3D bookmarks are lenticular and tilting it back and forth gives it a 3D effect or shows another image. They are 6 x 2.25 inches (152 x 57 mm) in size. They also come with a tassle or a soft-plastic token to help find your bookmark when in use.
This bookmark switches between winter scenes of a wolf (as shown) and a moose emerging from a birch forest.