Once you are in Athens, you must visit the pedestrianized Ermou Street. This is one of the top places to shop, with all the brands waiting to welcome you at the most competitive price rates. And of course, restaurants and cafeterias will offer a cool beverage or a light snack in between your shopping spree. 
Kolonaki Square is another shopping destination with dedicated fans, located just a few blocks from Ermou Street. There you will mostly find haute couture in high-end shopping venues. The newest trends are all here, along with classic pieces of clothing and accessories. 
Shopping malls in the center of Athens will also attract your attention and introduce you to great bargains, along with the traditional and somewhat oriental flea market in Monastiraki.