There are two sets of shelves. One set has the cross bars included in the design and the other set has separate cross bars. In each set, one can be attached with Command Strips and the other attaches with wall screws.

Dimensions: x - 243.87mm, y - 60.5 mm, z - 46.59 mm

I printed my shelf with Overture White PLA on a CR10 mini, modified with dual Z-axis, direct drive extruder, 0.6 steel nozzle, and borosilicate glass plate. The shelf was sliced in Cura 4.13.1, 0.30 layer height, temperature 210°, bed temperature 57°.

Glue is required to inset the cross bar.