D20 or Icosahedron, whichever you'd like to call it, either works. Critical hits to sacred geometry this awesome geometric shape is easy on the eyes. Made from maple wood, laser cut and laser engraved. Each magnet measures approximately 1.5" x 1.5" inches each. It comes with a strong magnet attached to the back. Nice and lightweight though. Perfect for your office, work space, game room or fridge! Stick them everywhere!