For serious retail therapy, most Athenians head to the shopping streets that branch off central Syntagma and Kolonaki squares. Syntagma is the starting point for popular Ermou, a pedestrian zone where large, international chains like Zara, Sephora, H&M, Massimo Dutti, Mothercare, Replay, Nike, Accessorize, and Marks & Spencer have edged out small, independent retailers. You'll find local shops on streets parallel and perpendicular to Ermou: Mitropoleos, Voulis, Nikis, Perikleous, and Praxitelous among them. Poke around here for real bargains, like strings of freshwater pearls, loose semiprecious stones, or made-to-fit hats. Much ritzier is the Kolonaki quarter, with boutiques and designer shops on fashionable streets like Anagnostopoulou, Tsakalof, Skoufa, Solonos, and Kanari. Voukourestiou, the link between Kolonaki and Syntagma, is where you'll find Louis Vuitton, Hermes, Polo Ralph Lauren, and similar brands. In Monastiraki, coppersmiths have their shops on Ifestou. You can pick up copper wine jugs, candlesticks, cookware, and more for next to nothing.
Many stores in Athens are open until only 3 or 4 on Monday, Wednesday, and Saturday, but they may be open later (until 7 or 8) on Tuesday, Thursday, and Friday.
The flea market centered on Pandrossou and Ifestou operates on Sunday morning and has practically everything, from secondhand guitars to Russian vodka. Keep one rule in mind: always bargain!