Many customers complained the bad quality on the 48 PU pen case on the market. We offer a 46 slot leather pen case and make lots of improvement including zipper, slot, size and handcarft. The main issue is that the case is a little heavy, it is about 600-650g. If anyone have suggestion to improve the quality of it, please let us know. The dimensions of this 46 slot pen case are as the same as the 48 pen case on the market. To ensure it hold larger pens securely, we have 10 slots for large fountain pens and 36 slots for standard size fountain pens. Slots: 46 slots (36 slots with 19mm width, 10 slots with 23mm) Weight: 600-650g