Simple Card / Letter holder

I've had my outgoing letters / cards / reminders etc. in this area for a while, just leaning up against my light, but whenever I try to get something they often just topple over. I designed this quick print (Less than 2 hours on my Ender 3v2) and it's perfect for my needs. 

The holder stays up by itself, but I added a bit of double-sided tape to the bottom so it will never move out of place. Holes are added for slightly less material use, plus decorative purposes. Let me know if you need a version that does not have the holes.