My wife bought some used cabinets for our newborn daughter, but the knobs looked old and used. So i designed some knobs with animal faces.

You have to print one attachment for each animal. Screw the attachment to the back site of the knobs and secure it with a drop of glue. To attach the knobs to your cabinet or drawer, you can use a metric M4 screw or a wood screw with 4,5 - 5mm diameter.

If you print the Knobs on their backs and the attachment standing up, you don´t need any supports. I would suggest to use 4 perimeters.