Below, we're going to walk you through a self-measurement. We're going to require 5 measurements (LENGTH, SHORT HEEL, INSTEP, BALL, and ANKLE), but to double check you've taken those measurements accurately, please provide us with your average shoe size here (Please include whether the size you're providing is in US/ UK or Euro as well as Men's or Women's). I know your size likely varies across brands/ styles, so simply let us know what size of shoe you tend to purchase most often than not. Too, if this is a surprise gift pair, we realize it's unlikely you'll be able to sneakily obtain the measurements we need to ensure a perfect/ custom fit, but as our shoes do fit "true", we can more often then not avoid a mis-size, if you're able to provide us with the average shoe size of the eventual gift getter (at the very least this will be a good starting point, but we'll likely have you do a little more sleuthing for us to ensure we hit these out of the park).