This is a very useful bracket for any sort of furniture. I used it for my CNC-cut desk. A simple design which is perfected with chamfers and looks very tidy in white.
Dimensions: 60x60x20.4 mm with four holes (approx. 5.5 mm in diameter each)
It's quite heavy duty, the position for the layering on the printer should ensure that. (Acting forces in the plane of the printed layers)
The height of this bracket is 20.4 mm, it is ment to print with a layer height of 0.3 mm (= 68 layers)
I guess other layer heights (at least the smaller ones) are OK.