Covers Newsstand Stella McCartney gown, $3,620. bergdorfgoodman.com. Tiffany & Co. earrings, $1,650, and necklace, $4,600. tiffany.com. Subscriber Ralph Lauren Collection cape, $17,000. ralphlauren.com. Bulgari Serpenti High Jewelry bracelet, price upon request. 800-BULGARI. Christian Louboutin sandals, $995. 888-856-8247. Internal (on model) Fendi coat, $3,690. fendi.com. Barbour boots, $99. 212-570-2600. Messika Paris earring, $10,830. messika.com. Internal (on Williams) Stella McCartney gown, $3,620. bergdorfgoodman.com. Tiffany & Co. earrings, $1,650, and necklace, $4,600. tiffany.com. Cartier Juste un Clou earring, $810. 800-CARTIER. Welcome to the Issue Page 24 Hermès necklace, $742,400. Must-Haves Page 45 Givenchy windbreaker and jacket, prices upon request. Page 46 Dior shirt, skirt, necklace, belt, tights, and shoes, prices upon request. Grand Bazaar Page 50 Dior belt, price upon request. Page 51 Sandro coat, price upon request. Dior Fine Jewelry ring, price upon request. Rolex watch,…