If you look carefully at the ayah, it clearly states that the head covers (khumur) should be drawn over the neck slits (juyoob). Khumur is the plural of the Arabic word "khimar" which means a headcover. Juyoob is the plural of the Arabic word "jaiyb", which refers to the neck slit (of the dress).
Yet, some sisters just cover their head with something, and think they are fulfilling the rights of Hijaab, although part of their hair or body is showing, or their whole neck and chest area are exposed. Actually, that was the way of the women of Jahilliyah.
Al-Qurtubi said: "Women in those days used to cover their heads with the khimar, throwing its ends upon their backs. This left the neck and the upper part of the chest bare, along with the ears. Then Allah commanded them to cover those parts with the khimar."
So secure the scarf well around your face, covering your neck/chest area, and keep those half sleeves and capri pants for your Mahrams
Sorry.…tight jeans and short shirt just don’t cut it
You can’t wear tight jeans and a short shirt with a piece of cloth on your head and think this is Hijaab. Nor can you wear anything else that is tight, describing the shape of the body in any way, even if it is long. The Prophet (Sal Allaahu Alaiyhi wa Sallam) said:
"In later (generations) of my ummah there will be women who will be dressed but naked. On top of their heads (what looks) like camel humps. They will not enter into paradise or (even) get a smell of it." (Muslim)
If it is see-through, its NOT Hijaab
You CANNOT use chiffon or other see through material to cover your hair and body. Everything should be covered and the color of the skin underneath should not be visible.
The Prophet (Sal Allaahu Alaiyhi wa Sallam) once received a thick garment as a gift. He gave it to Osamah b. Zayd, who in turn gave it to his wife. When asked by the Prophet why he did not wear it, Osamah indicated that he gave it to his wife. The Prophet then said to Osamah "ask her to use a "gholalah" under it (the garment) for I fear that it (the garment) may describe the size of her bones." (Ahmad, Abi-Dawood)
(The word gholalah in Arabic means a thick fabric worn under the dress to prevent it from describing the shape of the body).
The Hijaab shouldn’t attract attention
The dress should not be such that it attracts men's attention to the woman's beauty. Allaah clearly states “not to display their beauty (zeenah).” Yet, Subhaan Allaah, some Hijaabi sisters are dressed in such a way that they attract more attention to themselves than they would if they didn’t wear Hijaab!! How could such zeenah be concealed if the dress is designed in a way that it attracts men's eyes to the woman? It beats the purpose of Hijaab.
Allaah tells us: “And stay in your houses, and do not display yourselves like that of the times of ignorance…” [al-Ahzaab:32]
What about make-up and perfume???
Wearing make up is also part of the zeenah that Allaah orders us NOT to display. So if your head and body are appropriately covered yet you are wearing bright red lipstick or dark eyeliner such that people confuse between you and a raccoon….uh sorry, that’s not Hijaab. And keep those nice fragrances for the home, between you and your husband. That’s part of Hijaab too, even if you are going to the Masjid. The Prophet (Sal Allaahu Alaiyhi wa Sallam) said: “Any woman who puts on perfume and passes by people so that they can smell her fragrance, is an adulteress.” (al-Nasaa’i, Tirmidhi: hasan by Albaani)
Tinkling Jewelry and Jingling bracelets
‘Loud’ and tinkling anything, be it jewelry, bracelets, clip-clopping shoes, little bells on clothes, you name it, if it jingles or makes noise, it is against the principles of Hijaab, because it attracts attention to the one wearing it. That is what is meant when Allaah orders us in the above verse…“not to strike their feet (on the ground) so as to make known what they hide of their adornments.”