Going to give a secret tip that has worked for me in the past and with my beautiful 180 vintage suede loafer. Simply know your width. The important thing is to measure the loafer from the heel to the tip of toe. You have to know what is your measurement on this for loafers in general. Not pointy loafers but a similar last model. Then again if you have a high instep or too much foot irregularities this might not work. If you have a relatively normal foot, you shouldn't have a problem