The honors here proposed by Haman were such as Persian monarchs rarely allowed to subjects. Each act would have been a capital offence if done without permission. Still, we find Persian monarchs allowing their subjects in these or similar acts under certain circumstances.
Related Commentaries of Esther 6:8
Esther 6:8
8 Let the royal apparel be brought which the king useth to wear, and the horse that the king rideth upon, and the crown royal which is set upon his head: