Frederick Bigler knows a lot about posh shopping along Fifth Avenue in New York City. A recent spree netted him two Burberry shirts, an Armani jacket and a pair of Ferragamo shoes.

A little timid about taking on shopping in the city? Don’t be. As The Peninsula New York’s chief concierge, Bigler’s insight makes your high-end shopping dreams come true.

“Shopping along Fifth Avenue should be a fearless, friendly and relaxing version of ‘Veni, vidi, vici’, ” Bigler says. But conquering the city does require planning. “If you don’t plan — call or email the concierge — one can lose focus quickly, as New York can be a bit like a giant candy store for the traveler craving all we have to offer.”

To help travelers come, see and conquer, The Peninsula concierges worked with LUXE City Guides to create PenCities, an exclusive online luxury lifestyle journal for the nine cities that host a Peninsula hotel. These guides feature insights into fine dining, entertainment, shopping, design, nightlife, spa and wellness. Think of it as insider, in-the-know information.

“For the New York edition, you can look for postings from hot new restaurants and museum exhibits to lesser-known jewels such as a luxury vintage shop downtown,” Bigler says.

Bigler has a wealth of shopping-in-the-city insight he’s happy to share firsthand with guests. First up, he suggests hiring a personal shopper and a chauffeur. “There is nothing better than calling your driver to come and pick up your bags while strolling to the next destination along Fifth,” Bigler says. “Now that is luxury.”

Another tip: Bring a few pairs of shoes. Which shoes a shopper is wearing while trying on clothing can make the difference in getting perfect tailoring. And just where should you plan to stop? Bigler offers these suggestions.

To start: the sleek, glass-walled Louis Vuitton New York One East, 1 E. 57th St. Select supple travel pieces sure to be the envy of fellow passengers, even among first-class boarding. But be sure to look beyond the luggage to classic wardrobe and accessory pieces, including wedding rings and watches.

“[Creative director] Marc Jacobs is brilliant, and his collaboration with Yayoi Kusama is nothing short of amazing,” says Bigler of the brand’s colorful, polka-dotted collection.

Another high-end haven is Saks Fifth Avenue, 611 Fifth Ave. Here peruse dozens of luxury designers’ latest collections from Alexander McQueen — a favorite of the Duchess of Cambridge — to all-American designer Tory Burch.

Refresh at Café SFA for a light lunch while taking in the views of Rockefeller Center and St. Patrick’s Cathedral. Just don’t overdo it, cautions Bigler. “My advice is to eat salads or lighter fare for fittings, drink Champagne for recreation, then finish with an espresso for energy.”

From Saks, head to Bergdorf Goodman, 754 Fifth Ave. This unique department store’s European and designer collections cannot be missed. Be sure to take a peek at the couture for a preview of the upcoming season. Not sure where to begin? Bergdorf Goodman offers complimentary appointments with the Personal Shopping Salon to make the most of the experience.

A new wardrobe might make that pulled-back hairstyle look dull. Schedule time at the Ponytail Bar at the John Barrett Salon for a fashionable twist on a style standby. In a half-hour or less, stylists will perfect your pony, from sleek to tousled, braided to twisted, all while you take in sweeping views of the city from this penthouse locale atop Bergdorf Goodman.