FIXDRY Wall Shelf

You'll want to print this in the orientation that the model sits when imported. It puts the layer lines in a favorable direction for the force be applied. You do not need any supports to print this. This will fit on your “standard” 220mm bed.

I used hot-glue to secure the tabs to the shelf.

Use at your own risk as I don't claim any responsibility for failure. It has done great for me and with my testing. I used 12% adaptive infill with 4 walls and printed at a .2 layer height with great results. 

Make sure you upload and post your makes so I can see how it works for you and your setup!