Perfect! For storing CDs or DVDs, just the size I needed = 8 cm slice. Ideal to be vertically on a shelf. And in this capacity (100 U) it is not too heavy. And yes! It is also a criterion to be taken into account. Imagine 200 or 300 U. carried with one hand while you browse the other ... Missing only the possibility of indexing pages. Maybe one day, a manufacturer ....