6. Go online
If you're hard to fit, try a specialty Web site, like designershoes.com, which carries sizes up to a 16, or petiteshoes.com for sizes 4 to 5 1/2. Wide or narrow feet? Piperlime.com and endless.com have plenty of options.
7. Dress the part
Always try on shoes with the pants or jeans you plan to wear them with.
8. Pick the right heel
If you'll be on your feet for more than a few hours, choose a heel with more surface area, like a platform or wedge.
9. Learn your European size
Simply add 31 to your American shoe size if you're a 9 or below and 32 if you're a 10 or above.