I found no shelf for the Echo Show 5, so i decided to make one. I made a shelf for a corner first, and now added a straight up version for the wall, just because i can. ;-)

If you want a shelf for the corner, look here:

https://www.thingiverse.com/thing:3761438

Have fun printing!

Edit, 06.06.2020:
After one year hanging above my convection-thing underneath, that constantly blows hot air at least once a day to the back, and so the hot air goes up underneath the print..

...i can say that PLA totally holds up fine. No sign of sag or something going wrong.
But maybe its annealed now through the hot air. ;-)