I bought this for my Filofax Locher size staff. For this size, it fits perfectly. Although he makes big holes, but I'm pretty happy about that. Previously I made each hole individually with a normal office punch and these are smaller (so they can not be so beautiful turn over and make slopes). The price I find quite OK, because this Locher buys you is doing it once and then has him forever. The Liferzeit was relatively long for Amazon conditions, but it was still within the normal range (about 1.5 weeks)