The Tefillin on the head of the woman in the second picture 2nd one to the left has the Tefillin too low.
Tefillin must not be lower than the hairline, that is to say the place where the roots of the hair start to grow out from the skull.
I was told that people who have become bald, should put the tefillin above that spot that once had hair roots, even though now they are gone.
I don't know what Rabbi Moshe Feinstein says about women and tefillin, because there are rabbis based on one version of the text of the gemara, who are more strict about tefillin than other commandments but at least on the tekhelet.com site at
http://tekhelet.com/mois/TekWeb2002_files/frame.htmI saw an interesting psak halacha of Rabbi Feinstein.
Women & Tzitzit:
The Mitzvah•The permission is granted to every women who wishes to fulfill even those mitzvot which the Torah did not obligate; and they indeed fulfill a mitzvah and receive the reward for the fulfillment of the commandment - and according to the custom of the Tosafot they may also say the associated blessing - for shofar, lulav. And also tzitzit are applicable for a woman who desires to wear a four cornered garment - it should be different than a man’s garment - and by putting on it tzitzit, she fulfills this mitzvah (R. Moshe Feinstein, Iggeret Moshe, Orech Hayim 4:49, s.v. ibra d’ika).
There are others who argue against the position of Rabbi Feinstein on Tzitzit.
I also heard that Rabbi Feinstein in theory said having a minyan entirely made up women and only for the benefit of other women might be permissible. But it is also stated that this is true only if they are doing it for the sake of heaven and not for the sake of ideologies that are contrary to Judaism.
Again, even if what I heard is correct, other Rabbis have more stricter opinions and I don't take responsibility to tell anyone who is right or wrong.