We only carry the Black Oiled Boston in Narrow Width-which fits most narrow to medium width feet. If you have very wide feet please see another style in Regular Width.
Fit Guidelines:
Birkenstock footwear is designed and sized to provide a roomy fit allowing your toes and feet to wiggle and be free. This sometimes takes a bit of getting used to. Also, most Birkenstock styles come in two widths: narrow and regular, so you can really find the best possible fit for your feet. For the most natural fit, your feet should rest comfortably inside the footbed and there should be about 1/8" to 1/4” between your toes and the end of the footbed.