“Why, I’ve just seen a fellow downstairs in a morning suit of yellow velvet,” exclaims Wooster to Jeeves in PG Wodehouse’s The Inimitable Jeeves. It’s telling that the illustrated cover to The Wit and Wisdom of PG Wodehouse features a whimsical cartoon of a figure in a sleek morning suit, canary-yellow waistcoat as a point of contrast to the black severity of the coat.
If anyone were to know the rules of correct morning suit soignée it would be Wodehouse, but in 2026, morning suits are a rarity for most men, a feature of Ascot and summer weddings, which can make getting the small details right rather daunting.
Take the issue of the bottom button on your waistcoat, for example. Undone is the received wisdom, but yours truly wasn’t aware until the designer Oliver Spencer, creative director of Favourbrook, cast an exacting eye over my ensemble one sweltering day in the Royal Enclosure at Ascot and advised on letting the button out.
Whether you’re set for a day at the races or the happiest day of your life this summer (or just playing a supporting act as best man, usher or proud father), here’s how to navigate the princely morning suit with confidence.
Have fun with colour...
“It’s all about clever detailing, slightly bending the rules to your character,” says Spencer, which has been outfitting men for Ascot and wedding days for over 35 years. “I love pocket squares in different patterns and colours that work as a point of contrast to your tie. It shows a bit of flair and personality. You can also add a bolder shirt – perhaps a pink, or one with stripes. Your waistcoat is also an opportunity to inject colour; it lends a sense of occasion,” he says.
Kristian Ferner Robson, the founder of Jermyn Street institution Oliver Brown, agrees: “I always advise that our client goes classic first, and then if you have the confidence you can branch into pattern and colour. Personally, I like pairing a bright waistcoat – perhaps in a pastel tone – with a more sombre tie.”
... but know your morning suit tones
Navy was first approved to be worn in Ascot’s Royal Enclosure in the 2021 dress code, but it’s got something of a reputation as an arriviste newbie, and rather City-centric, particularly among the old guard of the racing institution. As Robson diplomatically puts it: “Navy suits have been introduced in more recent years, but it’s the more ‘new’ of the morning suit options. If in doubt, stick to black as it’s much cleaner.”
David Taube, the head cutter at historic Savile Row tailoring titan Gieves & Hawkes, says: “Morning suit shades tend to fall into two distinct types; a black coat with grey trousers that have a stripe or houndstooth, or full grey, where the whole ensemble is very sleek and sharp.”
The King has long relied upon a dove-grey morning suit from his go-to Anderson & Sheppard. The tone also works harmoniously with the pastel shades of waistcoats and accessories that are so prevalent with morning dress. “The King prefers light grey and it’s a great look, but if you’ve got a big summer season that requires morning dress, a darker shade of grey, a dark charcoal, will weather better,” says Spencer. He advises pairing with the tried-and-tested dogtooth or striped trousers.”
Fine tune the details
That bottom button is just one of the signifiers of “correctness” when it comes to the little touches, an affectation from equestrian dress that parlayed into formal attire. It also helps when sitting in such an upholstered get-up (there are a lot of layers). While polished Oxfords are standard practice, Spencer recommends loafers as an alternative: “ones in black can be lighter on hot days and look a little more contemporary,” he says.
While corsages feel suitably ceremonial, Taube advises caution: “It can look a little fussy, and the timelessness of the outfit should speak for itself. I wouldn’t go further than a pocket square.”
Consider the kind of tie too: “A thick knot looks right for the sense of occasion, and consider woven, too, as they can lend a kind of lustre, especially if they’re silk. They also create a chunkier knot,” says Robson.
Get the fit right
Taube has seen a marked shift in men’s body shapes in this #gymbro era. “Younger customers are often more broad on the shoulders and chest than they were years ago, and it’s important that everything is measured correctly because if you have a wide chest on the coat, the collar can gape and come away, showing the shirt underneath. It’s also really important to make sure it’s not tight on the arms, because you’ll have a shirt and waistcoat already packed in there underneath.” On that note…
Be mindful of the heat
“People forget that Ascot falls during the height of a June summer, and that most weddings that require morning suits are throughout that season too,” says Spencer, who always steers his clients towards Super 120 wools, a lightweight option that’s known for its softness. “You want something that’s fluid in feel and minimal in construction because you’re going to have three layers to contend with.”
Consider the fabric on your top hat in this regard too, says Robson. “I’d always suggest upgrading to a silk top hat – often they are made in beaver felt fur – as they are so much lighter,” he says.
Avoid this one perilous style pitfall
On this every expert is in agreement; the ultimate sartorial crime one can inflict on a magisterial morning suit is to have the trousers fit incorrectly and lead to a plume of shirt showing between the waistband and the waistcoat. “Trousers must fit over the hips to stop that happening,” says Taube. “Because otherwise it just looks messy, rather ‘end of the night on the dance floor’.”
“Make sure they are high-cut, because that will stop any riding up,” agrees Spencer. “Braces are another ‘layer’ and add an extra faff in the heat, but they do stop any chance of it happening.”
“You must never show a gap below your waistcoat,” chimes Robson. “It’s the biggest no-no. And I also think it’s good form to avoid sunglasses with your top hat, as it just doesn’t look correct.”
Points on which even the exacting PG Wodehouse would concur.