Love them!
"Love them!"

Selecting the perfect shoe size may sometimes seem to be confusing; this can be due to the many conversions between women's and men's sizes or understanding different measurement systems such as European shoe size. Many people search online prior to making a purchase because many different regions have different systems for defining their shoe sizes.
For the purpose of this guide, we will clarify the conversion from size 9 to all other size conversions, as it happens to be one of the most commonly searched for shoe sizes on the internet, so all of the conversion formulas above would also apply to other shoe sizes as well. Therefore, once you understand how each formula/conversion works, you can then apply them to any shoe size with confidence.
Kai pairs elegant cross straps in faux leather with an adjustable buckle, so you get a fit that's actually yours and not a one-size-fits-most guess. The EVA outsole is light enough for beach trips but grippy enough for city sidewalks too. Under your foot, a cork footbed lined with soft suede and sweat-resistant memory foam keeps things breathable and cushioned step after step. The built-in arch support takes real pressure off your feet, ankles, and knees, and if you're one of the many women dealing with plantar fasciitis, the contoured cork footbed and better alignment tend to make a noticeable difference. Kai carries the APMA Seal of Approval, so this isn't just a comfortable looking sandal, it's one with real credentials behind it. Go with your normal size. If you're between sizes or your feet run wide, bump up a full size instead of rounding down (7.5 becomes 8). It's a medium width fit, and the Size Chart has the measurements laid out if you want to confirm before checkout.
Choosing Your Size
Order your usual sandal size for the best fit.
Half Sizes or Wide Width
If you wear a half size or have wider feet, size up to the next full size. Ex: If you’re a 7.5, we recommend ordering an 8.
Fit Notes
Ships within 24 hrs from Austin, TX
Enjoy 30 days of comfort—love them or exchange free.
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Trusted by foot health experts, Aerothotic sandals carry the APMA Seal of Acceptance — so you know they’re not just comfy, they’re good for your feet.
Yes, order your usual sandal size. If you’re between sizes or have wider feet, we recommend sizing up.
The fit is a medium width, but the cushioned design adapts to most foot shapes. If you’re in between, size up for a more relaxed fit.
Yes! Our sandals are made with water-friendly materials that dry quickly and won’t lose shape.
Many of our customers find relief from everyday foot pain thanks to the arch support, cushioned heel cup, and shock-absorbing footbed.
No worries — you’re covered by our 30-Day Comfort Promise. Try them out, and if they’re not right for you, exchanges are free and easy.
Overall rating: 4.5 / 5 from 4 reviews.
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"Love them!"
"Pretty sandals, good looking with any outfit"
"Fit a bit more loose than other cork-like styles"
"Super comfy!!! I walked all day in italy and my feet felt great!!!"