Insert for Imperium: Horizons (FS-IMPERIUM) - Folded SpaceNote: This product is intended for a box size of 30. 5 x 30. 5 x 9. 8 cm. Official full colour insert compatible with Imperium: Horizons., including space for the cards from Imperium: Classics and Imperium: Legends games. All cards can be sleeved with quality sleeves. The design provides both efficient storage and improved game play. Many of the trays can be utilised during the game, and they greatly aid set up and clear away times. The rules and