"I order the sandal in size 9. I wear an 10 in sandals, high heels, wedges, & flip flops. In women tennis shoes I'm an 9. I order the size 9 in these gladiator sandal because I was reading some of the reviews & some says the top part of the sandal fit big around the calves. That is true! the top part do fit big. I have small calves & the 9 in these gladiator sandal fit me prefect. So if you have small calves go down a size. If you have big calves you might need to go with your regular size in these gladiator sandal. You going to fall in love with these gladiator sandal. Good Luck!"