This model is great from labeling your Prusa Mini+. I used it to label the printers in my classroom. This would work great in a print farm to differentiate between printers. The base easily snaps on to the Z axis stepper motor. The label snugly slides into the slot on the base.

This print requires a color change to make the number stand out. I recommend a contrasting color. This requires no additional hardware.

No supports needed and printed at 0.2mm layer height

I have attached the fusion 360 file if you need additional numbers or want to change to text. Edit sketch 10 to edit the text box.