For my non-ferrous and felt pens, which I like to use from time to time, I was looking for something decent, suitable to boxing. My pins were previously in a drawer, unsorted. In one of these pins boxes are with me now 25 markers and there is still room for some more. Even my many colored pencils (40 pieces) easily fit with room for improvement in the second box, which I had ordered. Everything is now sorted. I can only recommend, because the simple design makes good everywhere.