2 Best Places to Shop in St. James's, London

With its creative displays and eclectic, well-chosen mix of merchandise, this four-floor emporium is as much art installation as store. The merchandise and its configuration change every six months, so you never know what you will find, which is half the fun. The creation of Comme des Garçons' Rei Kawakubo, Dover Street Market showcases all the label's collections for men and women alongside a changing roster of other ultrafashionable designers, including Gucci, Raf Simons, Balenciaga, Loewe, Wales Bonner, and Molly Goddard, all of whom have had their own customized miniboutiques—plus sneaker and denim collaborations, eyeglass frames, and jewelry. An outpost of Rose Bakery on the top floor makes for a good break.

The Jermyn Street store sells luxurious jackets, cashmere sweaters, suits, ties, pajamas, ready-to-wear shirts, and accessories perfect for the man who has everything. The brand is best known for its superb custom-made shirts—worn by King Charles III and every James Bond to appear in film, to name a few. These can be ordered at the nearby Bury Street branch which is devoted to bespoke wear. At least 18 separate measurements are taken, and the cloth, woven to the company's specifications, comes in 1,000 different patterns—the cottons feel as good as silk. The first order must be for a minimum of four shirts, which start at £395 each.