Use the templates that are linked on the fit page (scroll down to find the different sandal templates by size and style).
NOTE: Please measure your foot and/or use the templates. Sandal size is very often different from shoe size.
Also, if you have the Z-Trek, you may need a different size in the Z-Trail. The Z-Trek is a TINY bit longer than the Z-Trail, so if your toes come close to the edge in your Z-Treks, you may want to up one size for the Z-Trail.
