Short of measuring your feet, you might try measuring some of your shoes to provide Vass with a reference. Mr. Kuti just provided me with some measurements for the New Peter and Budapest lasts so I could compare. Maybe a little tricky being confident about the measurement of the interior foot bed length, but I'm sure it can be done to a reasonable degree of accuracy. Or maybe it is just as easy to go the route of measuring your feet for them. Seems like that's a very good way to get a solid recommendation on sizing.