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While I was researching on Hijab, I came across the following interesting page: -

http://www.almuhajabat.com/howtowearhijab.html

I dont know much about wearing hijab, but I have noticed that some methods used are not appropriate. For example, the scarf is worn in such a way that the hair shows, or sometimes the neck shows..

And while we are on the topic, how many cover the feet? (covering the feet is WAJIB and is part of Hijab)