Support BladeForums! Paid memberships don't see ads! I am measuring mine at the base of the spine with a Starrett no 215 micrometer I recently purchased used. Due to the limits of my collection this is not even the start of a complete list. My standard opinel#8 in carbon steel seems to measure .062 inches My Inox opinel #2 seems to measure .03 inches I am not sure of the accuracy of these measurements because I have not had an object of known dimensions(small enough to fit my micrometer) to double check my measurements with. If anyone has their own measurements to add to this list or confirm (or has fortunately been the case correct) my numbers please supply them.