If you have not already done so, please first read
When Job-Hunting: Dress for Success, by Dr. Randall Hansen.
The standard job interviewing attire for women is a conservative dark navy or
gray skirted wool blend suit. Job experts and employers seem split on the notion of pants
suits, so a skirted suit is a safer choice.
[For more information, read: The
Great Pantsuit vs. Skirtsuit Debate: What Should Women Wear to a Job Interview?.]
Other conservative colors -- such as beige or brown -- are also acceptable. Red is a power color.
A blazer with blouse and skirt is a possible second choice to a suit. You
should always wear a jacket.
Skirt length should be a little below the knee and
never shorter than above the knee -- no night club attire here. Avoid wearing a dress
(unless accented with a jacket). Blouses should be cotton or silk and should be white,
or some other light color. Shoes should be low-heeled.
Make-up should be minimal, with lipstick and nail polish
conservative tones. Pantyhose should be flawless (no runs) and conservative in
color. Do not have excessive body odor or cologne.
You should opt for a briefcase rather than a purse.
So, what are some sample outfits?
Here are some dress for success examples:

Sample skirted suit dress attire

Sample pantsuit dress attire

Sample combination suit dress attire

Sample skirted suit dress attire

Sample skirted suit dress attire

Sample pantsuit dress attire

Sample pantsuit dress attire

Sample skirted casual attire