KIZIK shoes are carefully tested to ensure they fit true to industry standard sizing.

The Boston & Dubai Fit similar to an athletic shoe.  round up half size, unless you have a narrow foot. 

In order to ensure optimum comfort, fit, and performance, you need to follow these simple, one time, steps the first time you put on your KIZIK shoes.   

1. Customize the fit with the simple adjustment strips on both sides of the tongue. The factory adjustment is set for a low instep. You will likely need an adjustment to accommodate a higher instep. 
2. Next, insert your foot into your new KIZIK handsfree shoe. This should be done with gentle pressure forward. No wiggle, thumb, or fingers required.
3. You’ll feel the F.A.S.T. heel gently pop up comfortably around your heel; you may even hear it.
4. IT'S ON!
5. Don’t forget to tell your friends!