NASA Spacecraft Laser Voyager Space Shuttle Cube Images created from the actual NASA blueprints Laser-etched, ghost-like 3D imagery within 60 mm glass cubes Subsurface Laser 3D Imagery of Authentic NASA Spacecraft in Glass Best viewed against a dark backdrop, we highly recommend the separate purchase of the lighted base (with 4 built-in LEDs) for optimal display Each beveled glass cube measures 2 3/8" (60mm)