• Picking an interview outfit might be one of the more stressful parts of preparing for a job interview. 
  • An ideal interview look shows the employer that you're a good cultural fit for the company.
  • What not to wear to an interview includes suits at a laid-back start-up and T-shirts at a law firm.
  • Above all, interview outfits should be unwrinkled, clean, and not revealing.

Your interview outfit should be professional and put-together. It won't necessarily be the most stylish outfit you'll ever wear, but it should communicate confidence and a good work ethic.

But the days of absolutely having to wear a suit to a job interview are over, said Marc Cenedella, CEO of recruiting firm Ladders.

In fact, rolling up to the office in a suit or skirt suit when everyone else is wearing jeans could hurt you in the interview process. It shows you're not a cultural fit for the company.

"Some of the most common mistakes people make when dressing for an interview are following old and outdated advice or not taking the time to do their research and ask questions about the company culture ahead of time," Cenedella told Business Insider.

Cenedella suggested reaching out to your recruiter, company contact, or the HR team to get a sense for what people at the company typically wear to work.

"You can always be direct and ask 'Will I feel out of place in formal business attire?'" Cenedella told Business Insider. "If they answer 'not at all,' you know it's expected."

Regardless of the typical level of dress in the office, some decorum during the interview is still necessary — yoga pants, wrinkled shirts, or ripped denim shouldn't be in your interview wardrobe even for the most casual workplaces.

Here are the 17 things you definitely shouldn't wear to a job interview:

1. Anything that's wrinkled or wrinkle-prone

Ironing your interview look the night before is a non-negotiable.

"Make sure it's clean, unwrinkled, and that you feel that it presents you in the best possible light," Betsy Aimee, a digital content producer who writes on workplace fashion and entrepreneurship, told Business Insider. "People make an assumption about you before you sit down in the seat and start talking."

2. Something that doesn't quite fit you or is stained

That dress that's just a little too tight? Those shoes that have salt stains? You want to wear your best, most-polished clothing to the interview so you can feel confident from the get-go. Don't start off on the wrong foot with clothing that doesn't feel comfortable or look presentable. 

3. Light colours

If you're taking public transport or have a tendency to spill coffee on yourself, avoid wearing light colours, Barbara Pachter, author of "The Essentials of Business Etiquette" and business communications coach, told Business Insider.

Stained clothing is the ultimate no-go for job interview looks. Dark colours are the least likely to show stains, and are the safest bet. 

4. Anything that's too trendy

Unless you're interviewing for a job in the fashion industry, you're probably going to want to keep your outfit on the conservative side. 

Opt for neutral or earth tones, simple makeup and jewellery, and quiet patterns, the experts advise.

Your interview look is probably not going to put you on a street style blog, but you want to be remembered for your confidence and abilities. Not your clothes. 

5. Jeans and a T-shirt

Even if you're interviewing with Mark Zuckerberg, you shouldn't wear jeans and a T-shirt.

Granted, if you know the whole office is ultra-casual, you shouldn't show up in a suit. But you also shouldn't be quite as low-key as the rest of them. "You go in the middle," Aimee said. "You're not as casual as everyone else is, but you're also not too formal."

If you know everyone is in flip-flops, opt for baseline casual — dark denim and a nice blouse or shirt. 

6. Yoga pants or other gym clothes

Yes, athleisure is trendy, and it's crossed the over into workwear. But athleisure is still considered inappropriate in most conservative offices — and it definitely shouldn't be worn to a job interview.

7. Outlandish make-up or jewellery

Pachter suggested a light touch with your hair, nails, and makeup. It's not the time to rock your purple lipstick and super-long acrylics. 

She said men might consider a nice watch and simple cufflinks. 

8. Loud patterns or crazy colours

The experts suggest leaning towards quiet colours — navy, black, gray, or brown. 

9. Sandals

Even if it's a casual office, you will want to go a notch or two above what everyone else is wearing, Aimee said. 

Opt for fancy sneakers, loafers, or flats if you think dress shoes aren't right for the company. 

10. A crazy tie or a black tie

Navy, red, gray, or a pattern of these shades are safer options, the experts say.

Black ties should only be worn for black tie events. 

11. Earbuds or headphones

Store these in your bag before you get to the reception area.

Your future boss is going to be annoyed with you if you can't hear him or her because you're too engrossed in a podcast. 

12. Visible underwear

"Neither gender should show underwear, but they should wear underwear!" Patcher said.

13. A lot of perfume or cologne

One spray is fine. But your interviewer might be allergic to your perfume and get a sneeze attack. 

14. For men, shoes and belts that aren't made of leather 

Now is not the time for your coolest sneakers or your D-ring cloth belt. Even if it's a super casual office, men should stick to a leather belt or more upscale sneakers.

Don't look like you could go for a jog. 

15. Your flashiest nose piercing

Again, err towards the conservative. Unless you know it's a casual environment, experts say women should stick to ear lobe piercings while men may want to remove them all.

16. Ripped or light-wash jeans

Jeans are common in casual offices, but usually black jeans are the most acceptable.

Don't go with the most casual wash and cut for the job interview, or you'll appear unprofessional.

17. Something that doesn't make you feel awesome, confident, and ready for anything

If you feel stifled by having to wear a suit for a job interview, it might be a sign that the company's environment isn't a fit for you.

"Let your personality shine through," Aimee said. "If you're interviewing for a job and you feel the attire is off-putting to you, that's a signifier that the job is not a good cultural fit for you."

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