Ni0.23Cu0.11Zn0.66Fe2O4 ferrite flakes, with thickness of about 8μm and average diameter of 20–35μm, were prepared using a sol–gel bubble method. Morphology, phase evolution, static and dynamic magnetic properties of the flakes and their composites were studied. Magnetic measurements showed that easy magnetization direction of the flaky filler composite was parallel to its sample plane. Composites made of silicone resins and flakes had higher complex permeability, which can be attributed to the reduction in demagnetization factor due to their flaky shapes. This sol–gel bubble method should be also applicable to fabricating flakes of other multi-component oxides.