You want to look nice, but do not need to be overly "dressed up".
If you are a man, nice slacks or khakis with a button up and/or collared shirt is usually fine. Some situations will warrant a tie and/or suit. Ask your lawyer if you are unsure. Shave. If you have a beard, keep it trim.
Women can wear dresses, skirts, or slacks with a nice blouse. A cardigan and simple jewelry can give a wholesome look. Wear simple make up and do your hair. It may sound archaic, you should wear pantyhose with your skirt.but keep in mind some judges have been around for quite a while and expect decorum in their courtrooms.
Do NOT wear:
- sandals or flip flops
- mid-riffs or halter tops
- uncovered spaghetti straps
- shorts or short skirts
- t-shirts with offensive language
- pajamas and/or slippers
Take out facial piercings and cover your tattoos. The purpose of this is not to stifle your uniqueness, but rather because you never know who you may offend and YES, you are being judged. That is why you are in court in the first place! Even if just to be a witness, YOU ARE BEING JUDGED!!!
Ask your lawyer if you have any specific questions or concerns. And remember that you cannot take your cell phone into the courthouse. Some Courts will allow you to put your phone in a locker, so bring quarters and check with the clerk ahead of time if you need your cell phone for evidence purposes.