In Saudi they wanted to show the approx size of Adam (A.S) by making a garment in his size.
This was the idea of Hamdan with the help of 4 tailors. It took 18 days and 40 rolls of cloths were needed. The length of the garment is 29 meters: 9m between the shoulders, 12m width of the bottom, 10m length of the sleeves and 2m width of neck.
Narrated by Abu Hurayrah (R.A): The Prophet (S.A.W) said: Allaah created Adam in His image sixty cubits (about 30 metres) in height.When He created him, He said to him, Go and greet that group of angels sitting there, and listen (to) what they will say in reply to you, for that will be your greeting and the greeting of your offspring. Aadam (went and) said As-Salaam alaykum (peace be upon you).They replied As-Salaamu-alayka wa Rahmatullaah (peace and Allaah's Mercy be on you). So they increased it toWa Rahmatullaah. The Prophet Sallallaahu alayhi wa sallam added, So whoever will enter paradise, will be of the shape and picture of Aadam. Since then the creation of Aadam's (as)offspring (i.e. stature of human beings) has been diminished continuously up to the present time.

Saheeh Bukhari Vol 8 Hadeeth No: 6227 — with Abdul Jabbar Abbas.