The Office Capsule

Business Casual Outfits · Business Casual / Everyday Office · All year

The Business Casual Baseline: Black Blazer, Grey Trousers, Loafers

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Woman taking a full-length mirror selfie in an office lobby wearing an open black single-button blazer over a white tee, straight-leg grey tailored trousers and black leather loafers.
Look recreated with AI; all linked products are real items.

Blazer, tailored trousers, leather loafers. If you only learn one business casual formula, this is the one that works in the widest range of offices — and here it is on two different bodies.

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  • Star piece · exact piece $

    Othyroce single-button tailored blazer, black

    The single piece that does the work: notch lapels and a defined shoulder are what make the rest of the outfit read "office" instead of "weekend". Black is the most forgiving colour to start with because it goes with every trouser you already own.

    Fit: Cut long and slightly oversized. Take your usual size for the relaxed shape in the photo; size down if you want it closer to the body.

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  • Trousers · similar pick $

    Straight-leg tailored trousers, mid grey

    Grey does more than black here: it separates the trousers from the blazer so the outfit reads as separates, not as a suit — which is precisely the line between business casual and business formal.

    Fit: Buy for the widest part of the hip and hem to break just above the shoe. Cropped at the ankle is what keeps a loafer visible.

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  • Shoes · similar pick $

    Black leather penny loafers

    A closed leather shoe with a flat sole is the quiet requirement in most business casual dress codes, and a loafer is the one style that survives a commute without looking like a trainer.

    Fit: Loafers run narrow at the toe box on most of these listings. If you are between sizes, go up and add an insole rather than down.

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  • Layer · similar pick $

    Plain white crew-neck tee

    Under a blazer, a plain tee is what keeps the outfit on the casual side of the line. Choose a heavier cotton: a thin tee shows every seam of what is underneath and drags the whole look down.

    See it on Amazon

$ / $$ / $$$ is a price band, not a price: sellers change theirs without notice. Check the current one on Amazon.

Business casual is not a list of banned items — it is one structured piece over two relaxed ones. Here that structured piece is a black single-button blazer, and everything under it stays plain on purpose: a white tee, straight-leg grey trousers, black leather loafers. Grey trousers rather than black are what stop the outfit reading as a suit, which is the line between business casual and business formal. The same three pieces are shown on two body types below, photographed in the same spot at the same distance, so the difference you are looking at is the fit and nothing else.

Every image on this page is generated with AI. The clothes are real and sold by third parties; we do not photograph them ourselves.