It is permissible for a man to look at a woman whom he intends to marry provided that: 1- it is not with the intention of pleasure, 2 – it is to find out about her beauty or her defects, 3 – there should not be any barrier or hurdle to the marriage, 4 – he considers it problem that the girl will not reject him, in which case he can look at a woman’s face, hands up to the wrists, hair and a part of her body (neck and upper part of the chest).
It should be noted that grand Ayatollah Saafi believes that: as an obligatory precaution, he must suffice to looking at her face and hands up to the wrists.
 - Khamenei, Sayyid Ali, Ajwebat al-Istefaat, question 525; Sistani, Sayyid ali, Minhaj al-Salehin, vol.2, Nikah (Marriage), issue No. 28; Bahjat, Muhammad Taqi, Resalah Tawzih al-Masail, issue No.1944; Makarem Shirazi, Naser, Ta’liqat Alaa al-Urwat al-Wuthqa, Nikah (Marriage), issue No, 26; Fazel Lankarani, Muhammad, Ta’liqat Alaa al-Urwat al-Wuthqa, Nikah (Marriage), issue No. 26.
 -Makarem Shirazi, Naser, Ta’liqat Alaa al-Urwat al-Wuthqa, Nikah (Marriage), issue No, 26; Ali bin Abi Talib Religious School, Qom; Sistani, Sayyid Ali, Minhaj al-Saalehin, vol.2, Nikah, issue No. 28; Tabrizi, Jawad, Isteftaat, question 1580, p. 355, Sarwar Publications, Sitara Publications, 3rd edition, 1385 (2006); Bahjat, Muhammad Taqi, Resalah, Tawzih al-Masail, issue No. 1944, p. 386, Publications of the Office of the Supreme Leader, Amir Printing Press, 18th edition,Qom, 1378 (1999). Tawzih al-Masail (with annotation by Imam Khomeini) vol.2, p. 485, issue No. 2433; Imam Khomeini, Sayyid Rohullah, Tahrir al-Wasilah, vol.2, Nikah (marriage), issue No. 28, Payam Printing House, fifth edition, 1365 (1986).
 - Saafi, Lotfullah, Hidayat al-‘Ibad, vol.2, Nikah (Marriage), issue No. 28.