What is the Islamic ruling concerning the removal of women’s
facial fair – specifically, the upper lip, if the hair is very visible
or obvious? Is it permissible to remove it, or is does it come
under the category of plucking? What about hair on the legs
and arms?

Praise be to Allaah.

There is nothing wrong with a woman removing hair from her upper lip,
thighs, legs and arms. This is not included in the category of plucking
which is forbidden.