Complex sentence: The flag used by the Spanish Armed Forces is the same one used as state flag and national ensign, though military units use a more square version (1,280 cm x 1,475 cm) charged with the name of the unit.
Split into simpler sentences: The flag used by the Spanish Armed Forces is the same one that is used as the state flag and national ensign. Military units, however, use a less oblong, more square version (full size dimensions) charged with the name of the unit.