Sizes range from US 6 Women's to US 11 Women's, whole sizes only.
Sizing Help Video: This video illustrates how to determine or verify your size through measurements.
Women's Sizing Chart: This sizing chart is specifically for the shoes in Women's sizing in a medium width.
All BILLY Sizing Charts: This link leads to our complete collection of sizing charts for Women's, Men's, Kid's and Toddler sizing.
If you would like assistance confirming your size, please feel free to email your "A", "D" and "E" dimensions, per the first half of the Sizing Help Video, to firstname.lastname@example.org. Please also share what size of shoes you may be wearing in other brands. We are always happy help!