And style mistakes that the opposite sex has voted as the most egregious? Well, you'd better listen up.
Female commenters on Reddit's r/AskWomen subreddit were asked to vote on what they consider to be the worst style blunders they see on men.
We've rounded up the 10 most upvoted, coupled with advice on how to best avoid them.
10. Jean shorts.
J. CrewA pair of chino shorts is much more flattering.
"Jean shorts." — i_killed_baby_jane
Jean shorts — affectionately known as "jorts" — are a bit of a scourge during warmer months. They crop up with their unsightly hemlines and janky appearance.
Instead wear: A nice slim pair of chino shorts.
9. Baggy jeans.
A good fit is key.
"Baggy/'relaxed fit' jeans in general." — kidkvlt
Baggy jeans remind us of the '90s. We've come pretty far since then, and baggy jeans should be relegated to the same bin as Furbies and frosted tips.
Instead wear: Jeans that fit on the slim or even skinny side.
8. Inappropriate head wear.
You don't need to wear anything on your head.
"Fedoras. Just stop with them. It's not 1935." — Baron3ss
Hats — especially fedoras and other dressy hats — are completely passé in 2016. They look very out of place today, and will always make it look like you're trying too hard.
Instead wear: Absolutely nothing on your head.
7. Improper grooming.
No one likes an unkempt beard.
"Just ... not grooming. Not trimming beards ... that sort of thing." — deleted
Grooming is important, guys. When a guy is unkempt, others will start to notice.
Instead wear: A neatly trimmed beard, stubble, or no facial hair at all.
6. Fake glasses.
The only people who should wear glasses are those who need them.
"My ex used to wear glasses even though he didn't need them and it was really obvious that he didn't and he looked like an idiot." — howlingatthemoobs
It goes like this: If you're not wearing those glasses to see, you're not doing yourself any favors. And if you do wear nonprescription glasses, absolutely do not talk about it.
Instead wear: Prescription glasses or nothing at all.
5. Socks with sandals.
White sneakers are a much better look.
"Socks and sandals, especially white socks and sandals." — jmk816
Socks and sandals are never a good look. In fact, we named them one of the 11 deadly sins of men's style for that very reason.
Instead wear: A slick pair of white sneakers without socks.
4. Tucked-in shirts that aren't supposed to be tucked.
Not everything needs to be tucked in.
"Tucking your non-dress shirt into your non-dress pants." — mahayana
There's an easy test for this. If your shirt has long tails, it's meant to be tucked in. If it has no tails, it's not meant to be tucked in. If it has short tails, it's your call.
Go forth and tuck correctly.
Instead wear: Your tailed-shirts tucked, and your nontailed shirts untucked.
3. Pleated khaki pants.
Slim-fit chinos are a better choice.
"Stay away from those god awful khaki old man pants with the pleats in the front." — ocm09876
Pleats are generally considered unflattering, and should be avoided. The extra fold of fabric creates an odd, billowing silhouette that is best avoided if you're on the average-to-skinny side of pant sizes.
Instead wear: Flat-front, slim-fit chinos.
2. Clothes that don't fit.
Fit is the most important thing to consider.
"Wearing clothes that are waay too big for them!" — ocm09876
Over and over again, we at Business Insider have emphasized fit over everything else when it comes to clothing. We're not kidding. Well-fitting clothing is more flattering no matter what your body type is.
Instead wear: Clothes that fit well. (For suits, our guide is a good place to start.)
1. Loud shirts with writing, graphics, or flames on them.
Keep it simple.