Next time you have a shower, have a look at the shape of your foot prints and notice which parts are in contact with the floor. Then you can compare the shape to a picture (that I can't find at the minute) and choose the closest.
Yep, it was something like that. I was told to get cycling specific insoles, rather than running or walking, apparently they support your foot a bit differently. Again, I have no evidence to back this up.
Next time you have a shower, have a look at the shape of your foot prints and notice which parts are in contact with the floor. Then you can compare the shape to a picture (that I can't find at the minute) and choose the closest.