You will have no problem finding spots to shop in Miami, depending on where you are staying here are a few of the larger shopping hubs.
Coral Gables, off Ponce, Near S. Dixie Highway - Merrick Place is gorgeous, Neiman Marcus, Nordstrom, tiffany, gucci, bottega veneta, Carolina Herrera, several restaurants and many, many more stores.
North Miami Beach, Bal Harbour Shops,exquisite shopping area with both Neiman and Saks fifth avenue, plus chanel, LV, Gucci, Ferragamo, Fendi, Giorgo Armani, Versace, Cartier, Christofle, Carpaccio Restaurant and many more stores.
Down South, on South Dixie Highway and S.W. 136th street, The Falls Shopping Center, a more casual, not as prime mall but with Bloomingdales and Macys, Banana, Gap, Anne Taylor, Brook Brothers, Express, restaurants and several more stores.
Dadeland Mall, Off South Dixie Highway and S.W. 88th street, Saks Fifth Avenue, Nordstrom, Zara, Banana, and many many more.
Miracle Mile in Coral Gables, boutique stores and restaurants.
Miami Beach, Lincoln Road, Washington Avenue west Avenue, all full of high end and funky boutiques, fun area and one of a kind clothing boutiques.
And many outlet malls., I could go on and on, it is hard to find a place not to shop in Miami, if you post what kind of stores you are interested in and more or less the area you are staying at we can give you more specific details.....enjoy your stay in our fun city - H