Since my job requires court testimony, my interview attire was pretty easy. Conservative suit, long-sleeved shirt or blouse with a fairly high neckline and low-heeled, closed-toe shoes. Hair up, easy on the makeup and no fragrance. I’ve only worn this get-up about 3 times in the last 4 years since most cases never get past depositions.
What often gets overlooked is SOOOOOO important. You, and everything you wear must be clean and spotless; clean underwear and socks, freshly laundered, pressed shirt, dry-cleaned suit, a tie without food stains, polished shoes, clean-shaven or impeccably trimmed facial hair. NO neck hair and no crud under the fingernails. And get your hair dresser or barber to take care of stray hairs in eyebrows, ears and nose. Keep jewelry to a minimum. Take out any facial or tongue piercings. The holes will not grow closed during your interview. Small earrings on women are OK. On men, it is acceptable here in the Bay area, but probably not most other places.
If your interview is after lunch, don’t eat garlic, onions, peppers, sausage or anything that will give you gas or bad breath. Do not drink alcohol with lunch.
I know much of this sounds obvious, but as a former employer, I have seen people show up for an interview in all manner of dress. I always gave an evaluation of the person’s attire and general presentation, in addition to their skill level. If an interviewee did not have the sense to dress for the occasion and insisted on ‘expressing their individuality’, then I took it as a sign of immaturity. Interview attire is a costume.
BTW, short sleeved shirts are OK only if you never take the jacket off. If it is very hot where you are, go get yourself a white linen shirt with long sleeves. You may find that you are actually cooler with the sun off of your skin.
"If you are going to walk on thin ice, you might as well dance!"