Men's Navy Slim-Fit Three-Piece Suit — Tailored Blazer, Waistcoat & Trousers for Business & Formal Occasions | Koossa
Free UK delivery — includes tracking
30-day money-back guarantee
Classic Tailoring for the Modern Gentleman
This three-piece suit offers timeless elegance and a refined slim-fit silhouette perfect for the discerning gentleman who values quality and classic style. The set comprises a tailored blazer with notch lapels and flap pockets, a button-front waistcoat for added sophistication, and straight-leg trousers that complement the contemporary cut. Designed to deliver sharp, confident style whether you're attending a business meeting, wedding, or formal event, this suit bridges traditional craftsmanship with modern tailoring standards. The suit's clean lines and understated details ensure you present yourself with poise and professionalism on every occasion.
Why You'll Love It
- Three-piece versatility: Wear all three pieces together for formal occasions or mix and match the blazer and trousers for business meetings.
- Slim-fit tailoring: Contemporary cut that flatters the frame without restricting movement or comfort.
- Classic design details: Notch lapels, chest pocket, and flap pockets on the blazer; button-front waistcoat for layered elegance.
- Straight-leg trousers: Timeless trouser cut that balances modern tailoring with enduring style.
- Refined colour options: Available in navy, grey, black, and red to suit your personal style and occasion.
- Complete outfit solution: All the essentials in one set, making dressing for important events effortless and assured.
Perfect For
This suit is your go-to choice for business presentations, board meetings, job interviews, weddings, christenings, formal dinners, and black-tie events. Whether you're the best man at a friend's wedding, attending a corporate function, or simply wish to elevate your everyday professional wardrobe, this three-piece suit delivers the polish and presence you need. The waistcoat adds an extra layer of formality, allowing you to remove the blazer whilst maintaining a smart appearance. Pair with a crisp white shirt, silk tie, and polished leather shoes for a look that commands respect and radiates confidence.
Free UK delivery on every order — no minimum spend required.
Your order is carefully packaged and sent with full tracking, so you always know exactly when to expect your delivery.
Order today and we'll dispatch it the next working day.
Not quite right? You have 30 days to return your purchase — no questions asked.
We also offer a 2-year guarantee against manufacturing faults, because we stand behind everything we sell.
Choose options
Worn by you
You May Also Like
Frequently asked questions
How do I know this will fit me?
What is your returns policy?
How do you ensure the quality of your clothing?
Are the colours accurate in the product photos?
When will my order arrive?
Why shop with Koossa?
The Koossa team
We stand behind every piece we sell
We started Koossa because we believed fashion could be both timeless and trustworthy. Every garment is personally selected for its quality, cut, and craftsmanship. If it wouldn't meet our own standards, it doesn't reach yours. That's not a policy — it's simply how we work.