The portable Spirograph® Design Ruler fits in all 3-ring binders! The spirograph tool measures 8 ¾” x 4” and features 2 design rings, 3 spirograph wheels, ruler markings, and built-in stencil shapes and edges. Includes how-to instructions and 4 swirling designs on packaging. Create a binder for on-the-go spirograph art by adding the Spirograph® Design Ruler to a binder filled with a pencil case, pencils, and lots of paper!