What is a size 5.5 in boy's shoes converted to a women's size?

A size 5.5 in boy's shoes typically converts to a women's size 7.5. This conversion accounts for the general difference in sizing between boys' and women's shoes, where women's sizes are usually about 1.5 to 2 sizes larger. However, it’s always a good idea to try on shoes whenever possible, as sizing can vary between brands.