ZOU XOU shoes are sold in european whole sizes in closed-toe styles, and in european whole and half sizes in sandals. Please see chart below each product description for women's shoe size conversions. the standard width of all of our shoes is medium/average/b. If you have specific questions about your foot shape with regard to a particular style, please email us directly or take the shoe fit questionnaire below. We've fit the shoes on hundreds of women and can advise you on the best size or style for your foot shape! If you still have doubts and want to try the shoes on without commitment, shop our instant ship section to try on the style you're interested in. don't worry if it's not the color you had in mind. You can return it for a refund (less shipping and a $10 restocking fee) if it doesn't work out, or just exchange it for the right size/color. you can review our policy on that here. We don't guarantee that we will always have your size in stock, but always check the instant ship section first and check it often because it's constantly changing! PLease note that suede and kidskin styles will feel a lot more flexible and softer at first than the ones made from leather even if they're the same style.