Women’s sizes, on the other hand, run about 2 (ish) sizes larger. That’s why my son’s size 6 Nike slides fit my size 8 feet (and why he has been instructed to take good care of them).

Xesto takes this measurement and cross-references with the sizing guidelines of over 150 different shoe brands to fine-tune its predicted fit. Co-founder and CEO Sophie Howe says that Xesto’s ...

Across shoe brands and even within shoe brands, sizing standards are nonexistent; and while there are websites that offer sizing charts and measurement tools, they are often confusing and not specific ...