The perfect fit starts with trying on your Atoms' Quarter Size Experience one shoe at a time. There should be a ¼ to ⅓ of an inch distance between your longest toe and the front of the shoe (about a half a thumb nail). Your Atoms won't stretch much over time, so how they feel on day 1 is how they’ll feel on day 100.
Once you find your fit for your left foot, move on to your right. About 60% of people have at least a quarter size difference between their left and right foot so it is best to try on each shoe one foot at a time. We encourage everyone to find their perfect fit even if it means keeping a size 8 on your left foot and an 8.25 on your right.