I wanted a nice strong magnet to hold an 8x10 picture on my mother's refrigerator and aside from the simple fridge magnets, I couldn't seem to locate one on Thingiverse. Then, while the first (basic) design was printing, I got fancy and added a few effects to the design - Squiggly and Asian were born from my boredom. The design is for the 6x3mm neodymium 6mmx3mm magnets (actually 2.5mm) that are recommended in GSTGEORGE's design for the Push Pin Magnet. If you check Amazon or Aliexpress for them you should have no problem locating them.
My printer allowed me to print and simply force the magnets into place without any glue but you might find you need some superglue if you find the magnets to be a little sloppy.
The plain and the squiggly were created to be printed upside down so the hole doesn't get deformed for the magnet. However, due to the design of the Asian style one, I had to add a small support in the middle of the hole because it can't be flipped upside down to print. It seems to have worked well for my printer and the support should easily snap out of place when you're done.
Since there is some fine detail in the print, I found it easier to keep the first layer at 10mm/sec to make sure I got good adhesion on the first level. I think you can choose about as many or few perimeters as you choose since this is really a tight little design and it shouldn't make much difference. Mine came out really strong with a .4mm nozzle and 3 (1.2mm) perimeters. You may also want to print the 6.3mm versions if the magnets are just being too stubborn going into the holes.
On the Asian pattern, you'll need to snap off the small supports that are in the magnet holes. The holes may need to be slightly enlarged or you can tap the magnets into the holes with a hammer. Be sure to tap the top of the plastic and not the actual magnet since neodymium magnets break very easily. I used a board for support under the magnet since it's soft enough to give a little while tapping the top.
I use Home Cubify Design which I believe is being marketed under a different name nowadays. I've included my design files for anyone who might have the same software.