Created these 3 different angle throwing star magnets to look like your fridge was attacked. They are 3.25" x 3.25" x 0.25". They are designed to work with 5mm x 3mm round magnets. These are the ones I use Small Magnets, 180 Pack Refrigerator Magnets 5x3mm Rare Earth Magnets Neodymium Magnets for Crafts, Whiteboard, Kitchen Cabinet: Amazon.com: Industrial & Scientific

You will need supports to prevent the points from arching and the magnet holes from deforming. I set mine on tree support (Auto) with 40 degree angle. 0.16 layer height suggested, but lower is better. BE AWARE THESE WILL PRINT SHARP