hat and turban during salah

How long is a ghaz? Bahare Shari'at mentions the imaama length as starting at seven ghaz? How long is that in metres and cm?

 

A hadith-i sharif says:
(Two rak’ats of salat performed while one is wearing a turban is superior to seventy rak’ats performed without it.) [Abu Nu’aym]

 

It is said in hadith-i sharifs:
(Angels clad in turbans helped at Badr and Hunayn. The turban is something that distinguishes a Believer from a disbeliever.) [Daylami]

(Wrapping a turban around the taqiyah is what distinguishes us from polytheists. A light [noor] is granted for each winding of the turban.) [Imam-i Mawardi]

(Two rak’ats of salat performed with a turban is superior to seventy rak’ats performed without a turban.) [Abu Nu’aym]

It is said in a hadith-i sharif reported by Ibn ‘Asakir, “The Messenger of Allah used to wear a taqiyah either underneath his turban or without winding a turban around it.”

It is declared in a hadith-i sharif reported by Muslim, “When the Messenger of Allah wrapped a turban, he used to allow [about two spans] from the end of his turban to hang down between his two shoulder blades” (Mawahib-i Ladunniyya).

 

muslims never wears brimmde hats lıke baseballcap or stetson