This is a pretty simple round monitor riser. I'm 6'4"and even when monitors have adjustable height they're never tall enough for me. On advice from my Chiropractor, I decided to make some risers and I found this model on Printables. I've remixed it in two ways:

• I have three monitors – One 34" widescreen dell, and two 27" Acers. The Dell has an adjustable stand, but it doesn't go high enough and the Acers do not. So, I scaled up to 100mm height for the Acers and left the stand for the Dell at 70mm as the upstream source had it.
• I printed it in black ABS, largely because I only had orange PLA. Either should be fine.
• I printed with a .6 nozzle and the “.3 strong” layer height preset.

My suggestion is to figure out how high you want your monitor and then scale it using BBS.