Even the most die-hard T-shirt-and-jeans guy wants to look natty on his wedding day. This custom three-piece suit by Kleinfeld Men will never go out of style and looks put-together even when you slip off the jacket.

There’s no need for matching bands. The groom should love his as much as the bride loves hers.

The Details (clockwise from top left): Tacori platinum #64-7. De Beers “Fused Lines” platinum. Tiffany & Co. milgrain platinum. Kwiat rose gold. Furrer-Jacot brushed platinum #71-26250-M-0. Benchmark 14K white gold LCF150Wg.

All gents cut a dashing figure in a tux, whether it boasts a classic peak lapel (far left), a Victorian-era shawl lapel (second from left), or tails (far right). Even more daring? A white dinner jacket a la Bogart in Casablanca.

The Details (from left): Lanvin tuxedo (mrporter.com); Seize sur Vingt shirt and bow tie (212-625-1620). Vivienne Westwood Man tuxedo (323-951-0707); Dior Homme shirt; Phineas Cole tie (paulstuart.com). Tom Ford jacket (bergdorfgoodman.com); Emma Willis shirt; Budd bow tie. Hickey Freeman formal tails; Armani vest; Budd shirt; H. Huntsman bow tie.

When selecting your ensemble, ask, “What would James Bond do?” The answer: Pair a killer tux with debonair accessories. For a 007-worthy watch, think sleek. Go for a black leather strap and a gadget-free face.

The Details (clockwise from left): Georg Jensen #318; Girard-Perregaux 1966. Frederique Constant FC-245M5S6 (800-348-3332). Baume et Mercier #8849. Audemars Piguet (888-214-6858).

Cuff links may just be a guy’s only shot at putting on “fun” jewelry. Seize the day with a unique design element or a nod to a favorite hobby.

The Details (from left): Cartier rose gold. Kwiat diamond, onyx, and platinum. Wedgwood black jasper and gold horse-head. Dunhill gold-plated brass (mrporter.com).

Consider slick patent leather lace-ups -- or prove that not just Hugh Hefner can sport a slipper. You’ll look swanky, not silly, in a pair that’s black and not overly embellished.

The Details (from left): Gucci derby shoes (mrporter.com). Christian Louboutin suede “Dandy Flat” slippers.

As he did with his beloved first car, a man will get some serious mileage out of a dark, slim-fitting suit. It’s universally flattering and can easily be worked into the business-week rotation after the wedding. For adventurous types, a more formal option turning heads right now is the midnight-blue tux (middle); it’s not your grandpa’s wedding wear.

The Details (from left): Tommy Hilfiger blazer and pants (macys.com); Hamilton shirts shirt; Louis Vuitton tie. Marc Jacobs tuxedo; Robert Talbott shirt; Alexander Olch tie. Bottega Veneta jacket and pants; Thomas Pink shirt; Ermenegildo Zegna tie.

If you’re having an early-afternoon reception (or you’ve just nixed the idea of black tie), choose an impeccably tailored suit and dress it up with a few choice accents. Add a pocket square that complements your tie and -- bam! -- your outfit has become an ensemble.

The Details (clockwise from top): Hermes “Croisiere” silk. H. Huntsman silk. Ermenegildo Zegna silk. Brunello Cucinelli cotton-linen (312-266-6000). Robert Talbott silk.

Step out in style by selecting timeless shoes with softly tapered toes and no ornate detailing. With regular resoling, they’ll last for decades.

The Details (clockwise from bottom): Lanvin leather oxfords (mrporter.com). Cole Haan “Air Colton” plain oxfords (zappos.com). Fratelli Rossetti lace-up oxfords (couture.zappos.com). Hermes “Bill” shoes. Fratelli Rossetti leather lace-ups (saks.com).

An informal suit can stand up to sportier wrist wear. While digital faces and rubber straps are a little too triathlon, slightly chunkier designs with bells, whistles, and metal bands are spot-on.

The Details (from left): Hermes “Cape Cod Quantieme”; IWC “Portofino Chronograph” (212- 355-7271); Breitling “Transocean Chronograph Unitime.”

Garden parties and beach bashes call for a downshift in formality. To look and feel cool all wedding long, pick a pale suit in a breathable fabric like a cotton blend or tropical wool; both wrinkle less than linen. Any of these could be worn with leather sandals, boat shoes, or oxfords sans socks at a seaside ceremony.

The Details (from left): Brioni suit and tie; Brunello Cucinelli shirt (312-266-6000). Ermenegildo Zegna suit; Brioni “Cotton Check” shirt; Calvin Klein tie. Yves Saint Laurent suit (212-980-2970); Louis Vuitton shirt; Turnbull and Asser tie (mrporter.com). Dries Van Noten “Kensley” suit; Ermenegildo Zegna shirt; DKNY tie.

Nearly all suit pants are meant to be belted (hence the loops). The “match your belt, shoes, and watch strap” rule applies to black or brown pieces. Considering another color? Use your discretion.

The Details (from top): DKNY black leather; Bally blue calf leather; Martin Dingman alligator.

Match your tie to your threads for a polished, monochromatic look, or choose a punchier color from your wedding palette. Then, consider texture: Knit, for example, is more relaxed than silk.

The Details (from left): Thomas Pink “Cruise.” Bespoken silk knit. Calvin Klein “Crackle.” Louis Vuitton silk. Hermes “Oran” silk.

An informal suit can stand up to sportier wrist wear. While digital faces and rubber straps are a little too triathlon, slightly chunkier designs with bells, whistles, and metal bands are spot-on.

The Details (from left): Hermes “Cape Cod Quantieme.” IWC “Portofino Chronograph” (212- 355-7271). Breitling “Transocean Chronograph Unitime.”