The 6 outfits run from a neutral jacket over blue jeans to a navy toggle coat over wide-leg denim, and how the jeans fit at the ankle matters as much as the coat itself.
Your frame sets the rule: wide legs suit a taller build, while a shorter one does better with a slimmer leg and a coat that ends near the knee.
1. Neutral Colors Jacket and Jeans
A coat in beige or tan does the most with the least effort over blue jeans, because the two sit far enough apart in tone that neither fights the other.
Fit is where it succeeds or fails. The shoulder seam should land at the edge of your shoulder, and the sleeve should end near the wrist bone.
I like keeping everything underneath in the same quiet family: a tan or cream sweater, white sneakers. One accent, like a cap, is plenty.
2. Watch the Break
Jeans that pool over your shoes undo a good coat. The hem should touch the top of the shoe with a slight break at most, or sit just above it if you wear boots or sneakers.
Dark denim under a long brown coat looks best when the leg line stays clean from hip to ankle.
A tailor can shorten jeans for a modest fee, and I think it is the cheapest upgrade in this whole list. Cuffing works as a quick fix, but a proper hem looks sharper.
3. Uniform Dark Blue Jeans and Jacket
Matching a dark blue denim jacket to dark indigo jeans reads as a deliberate suit of denim, not an accident. Keep the washes close in shade; a faded jacket on dark jeans looks mismatched instead.
Black shoes and a plain tee or sweater under the jacket keep it grown-up.
I prefer a wide leg here, since a relaxed cut balances the boxier jacket. One pair of dark jeans also pairs with nearly every other coat on this list, which makes the purchase easy to justify.
4. Navy Overcoat with Blue Jeans
Navy overcoat over blue jeans is the easiest way I know to dress up denim without changing anything else. Pick a coat that falls near the knee, so it covers your jacket-length layers and gives you a long line.
Wear jeans a shade lighter or darker than the coat so the colors read as separate pieces. Roll the sleeves of any layer back if they bunch inside the coat.
5. Navy Toggle Coat with Wide-leg Jeans
Toggle coats read casual and outdoorsy, so wearing one over a dress shirt and tie makes a smart contrast. Wide-leg dark jeans keep the outfit relaxed enough that the tie does not look stiff.
A knit tie in a muted tone suits it better than a shiny one.
Keep the jeans long enough to skim the shoe, since extra width already adds volume. It is a good pick for an office with a loose dress code, though a slimmer leg would suit a shorter frame better.
6. Long Black Leather Coat with Jeans
A long black leather coat is the boldest piece here, and grey wide-leg denim is what keeps it from feeling severe. Black on top and a softer grey below gives you contrast without a clash.
Wear a plain black shirt underneath and let the coat do the talking.
Leather is heavy and carries a lot of volume, so I would pick a straight, loose jean and avoid anything skinny. It costs more than wool, but one good coat goes a long way.
Business Casual Style Tips
Jacket and jeans is the most familiar mix of dress and casual clothes, and its appeal comes from sitting in the middle: smart without being stuffy.
Denim began as workwear for coal miners and factory hands, and tailored jacket cloth comes from a different tradition, so the two do not match on their own. You have to bridge them.
Your shirt and shoes decide how dressy the result looks. Add a crisp shirt with a proper collar and leather shoes, and the outfit leans toward the office; swap in a tee and sneakers, and it leans toward the weekend.
Balance is the test.
When the jacket is sharp, pick dark, plain denim with no fading, rips or loud stitching. If the jeans are rough, soften the jacket’s formality.
For a business casual office, I would start with that dressier end of the range. You can always relax it later in the day.
For some guys, the term “business casual” is code for “Yes, you can wear a sport coat and jeans”. The pairing is so automatic, so widely accepted that it’s sort of a uniform unto itself.
— GQ
