Sizes range from US Men's 7 to US Men's 14, with 1/2 sizes through size 12.
Sizing Help Video: This video illustrates how to determine or verify your size through measurements.
Men's Sizing Chart: This sizing chart is specifically for the shoes in Men'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!