Decades ago I used to sit like a turtle when using my computer. The monitor used to be very low on the desk, and my back and neck would adjust for that. Over the years I acquired a much better posture, and I eventually bought monitors with adjustable stands. They sound amazing, and I cannot take any monitor without one serious anymore.
There is a catch, though: Their maximum height is severely limted. The Dell P2314H that I have offers only a limited range of adjustment. Neither the manufacturer nor various online resellers state the exact range. At the highest position, the center of the VESA mount is only 33 cm above the desk. As I usually work with command line windows and enter stuff at the bottom of the screen, I like to have the screen center slightly below eye level. Most ergonomics guides recommend having the top of the screen at eye level.
So I started to put books under it. And it really gave it this college student look.
Eventually I looked into monitor arms and saw premium ones for like 250 EUR. I just didn't want to spend more on the arms than the monitor itself, so I passed. Last year I looked into arms again and found some more affordable models and setteled for a dual arm model for 60 EUR. On the product page it said 40 cm which sounded good at first.