Is what is meant by "the cubit of the King" in the hadith about the height of Adam in Paradise the cubit of any king?

We have not found the meaning of "the King's cubit" in the commentaries on the Hadith. In a Hadith narrated by Al-Bukhari and Muslim, Adam was created in His image, his height being sixty cubits. In another Hadith narrated by Al-Tabarani and Ibn Abi Al-Dunya, the people of Paradise will enter Paradise with the height of Adam, sixty cubits, by the King's cubit. Al-Hafiz mentioned that the intended meaning is sixty cubits by his own cubit, or by the common cubit, and the former is more apparent. It was reported by Ahmad: Adam's height was sixty cubits in length and seven cubits in width. The creation of man in the best stature necessitates the moderation and proportionality of his limbs. And Allah knows best.