Feet swell when they get warm/hot, this will undoubtedly impact the fit. Many users limit wear time in hot temps, or wear a larger size during hot summer months.

As with heat, being on your feet for long periods including standing, walking, or running, creates minor swelling in your feet, and may impact the fit.

Most people prefer a size larger to wear to bed at night.  If it's too snug it tends to wake the wearer up during the night.

Not all feet are equal, including your left & right foot.

Narrow feet versus EEE widths, feet with long toes versus short, all might require an adjustment in sizing for maximized comfort.

Bunion deformity may impact sizing as those with mild bunions (less big toe displacement) might prefer a smaller size than someone with more advanced bunions.

Diabetes, prior foot surgeries/injuries can also impact fit. Some like a tight fit, while others can't tolerate it & wear them to protect their bunion from their shoes rubbing.

Bunion Booties are expected to relax after the first few weeks of wear, but are not expected to continue to stretch out.

We suggest starting with 1-2 hours per day just around the house initially, and working up from there slowly as comfortable.