Hadith Number 246.
Narated By Abu Huraira:
The Prophet said, "Allah created Adam in his complete shape and form (directly), sixty cubits (about 30 meters) in height.
When He created him, He said (to him),
"Go and greet that group of angels sitting there, and listen what they will say in reply to you, for that will be your greeting and the greeting of your offspring."
Adam (went and) said,
(Peace be upon you).'
'AsSalamu-'Alaika wa Rahmatullah
(Peace and Allah's Mercy be on you)
So they increased 'Wa Rahmatullah' The Prophet added 'So whoever will enter Paradise, will be of the shape and form of Adam.
Since then the creation of Adam's (offspring) (i.e. stature of human beings is being diminished continuously) to the present time."
THANK YOU ..
JAZAK ALLAHU KHAYR