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Style Guide

The Suitsupply Guide to
Semi-Formal Attire for Men

The Suitsupply Guide to
Semi-Formal Attire
for Men

Detail of light blue three-piece suit with white shirt and grey knitted silk tie.
Detail of light blue three-piece suit with white shirt and grey knitted silk tie.

Semi-formal attire is the modern gentleman's answer to events that demand more than business casual but stop short of full formal wear. It's the choice for weddings, cocktail parties, business functions, and evening gatherings where you want to look polished and confident without the rigidity of a tuxedo. At Suitsupply, our collections are designed to help you master this versatile dress code with ease, offering refined tailoring, premium fabrics, and a contemporary sense of style.

Decoding Semi-Formal:
What Does It Mean Today?

Semi-formal sits comfortably between the strictness of black-tie and the relaxed nature of business casual. While formal events call for tuxedos and a monochrome palette, semi-formal is built around a well-fitted suit or blazer, tailored trousers, a crisp dress shirt, and polished shoes. This dress code gives you room to express your personality through color, pattern, and texture, but always within the boundaries of sophistication.

Business casual, by contrast, is more relaxed—think chinos, button-down shirts, and optional blazers, with ties and formal shoes left up to personal preference. Semi-formal, on the other hand, expects a higher degree of polish and coordination, making it ideal for occasions where you want to make a lasting impression.

Building Your Semi-Formal
Look with Suitsupply

The foundation of any semi-formal outfit is a suit that fits impeccably. Navy, charcoal, and grey remain timeless choices, but don't hesitate to explore lighter shades, muted pastels, or earthy tones for daytime or seasonal events. Suitsupply offers a wide range of suits crafted from Italian wool, linen, and cotton blends, ensuring you'll find both classic and contemporary options to suit your taste.

Pair your suit with a dress shirt in white, pale blue, or a subtle pattern. Our shirts are made from premium Italian fabrics, delivering both comfort and a crisp appearance that lasts all day. If you want to add a modern touch, consider a textured shirt or a refined pattern to bring a bit of depth to your ensemble.

Light blue three-piece suit with white shirt and grey knitted silk tie.

A tie is typically expected for most semi-formal occasions, though some modern events allow for a tie-less look, especially when you're wearing a standout blazer or a suit in a unique fabric. Pocket squares and sleek belts provide the perfect opportunity to inject a little personality into your outfit without overpowering it.

When it comes to footwear, polished Oxfords, Derbies, loafers, or Chelsea boots are always appropriate. For summer weddings or destination events, suede loafers or sockless options in lighter shades offer comfort and style, while still keeping your look elevated. Suitsupply's tailoring is designed to pair seamlessly with classic leather shoes, ensuring a cohesive finish from head to toe.

Styling Tips for Every
Season and Occasion

Fit is everything in semi-formal dressing. Suitsupply's in-store tailoring ensures your suit, shirt, and trousers flatter your frame and allow you to move comfortably. For a contemporary spin, consider mixing and matching separates—a blazer in a seasonal fabric with tailored trousers in a complementary shade, or a fine knit layered under your jacket for added texture and warmth.

Seasonal fabrics are key to staying comfortable and stylish year-round. Lightweight linen and cotton blends are perfect for spring and summer events, keeping you cool without sacrificing polish. In the cooler months, opt for wool or tweed suits that add warmth and visual depth. Personal touches like a patterned tie, a subtle pocket square, or a textured jacket can set your look apart, but the goal is always balance—express your style, but keep the overall effect cohesive and appropriate for the occasion.

For evening events, a dark suit, crisp shirt, and tie create a refined, confident look. Add a pocket square for a sophisticated finish. Daytime weddings are the perfect opportunity to wear lighter suits or blazers in shades of beige, blue, or soft pastels. Linen or cotton blends will keep you comfortable, and while ties are optional, they're always a safe choice. Cocktail parties call for a suit or blazer with tailored trousers, a dress shirt, and loafers—feel free to play with color and texture, but keep the look unified. For business functions, stick to classic navy or grey suits, dress shirts, and conservative ties, finishing with polished leather shoes. At more casual weddings, a relaxed suit or blazer with chinos, a button-down shirt, and loafers is appropriate, but steer clear of jeans, T-shirts, and sneakers to maintain the right level of formality.

Final Thoughts

Light blue three-piece suit with white shirt and grey knitted silk tie.

The Suitsupply
Advantage

What sets Suitsupply apart is our commitment to quality, fit, and contemporary style. Every piece in our semi-formal collection is crafted from premium fabrics and tailored for a modern silhouette, ensuring you look and feel your best at any event. Our range of classic suits, mix-and-match separates, and thoughtfully designed accessories makes it easy to create a wardrobe that adapts to any semi-formal occasion, from weddings and business functions to evening soirées.

With Suitsupply, you're always ready to dress the part—confident, comfortable, and unmistakably well put together.