This chart implies that you have already measured your accurate boot size. If you do not yet have the measurement, hit back and read up on boot sizing.

Skate width is measured by the circumference of the ball of your foot. Take the measurement by going all the way around your foot.

To use this chart: Find your boot size in the left column. The measurmeent column to the right of the is what Riedell considers a C width. Over and under those measurements may require a custom width, though some boots down run a bit wider or narrower than normal.