Ordered this pen tray for
Ordered this pen tray for the first time, and am using it especially for my roller ball and ballpoint pens. These tend to be thinner and fit the grooves in this tray very well. You can use the pen for fountain pens (or any other writing instruments) as well. However, in my personal experience the grooves holding the pens are on the narrow side, and thus, thicker pens do not fit so well.
Apart from it's functionality the tray is very well made: the wood quality is outstanding and the classic design is timeless as well as highly aesthetic. Delivery was relatively fast from Japan, and I can recommend this product. Komorebi is a great online seller with very good service and a distinctly friendly Japanese customer service approach.