If anyone is on a budget like I am, old pip racks at antique stores work perfectly for fountain pens. They are usually 4" tall and the holes are usually 3/4" in diameter.
This looks like a nice fit for the Lanier Pens, but do ones that are bigger fit well? I'm look at how neatly the pens in the photo fit on the bottom with pens that are a nice size but not big?