The development of flexible optoelectronic devices has led to the appearance of new applications, ranging from wearable displays to medical implants. Hence, strategies have been developed to make flexible every component of the devices, including the light-emitting part. One such approach relies on the use of micro-or nano-light emitting diodes (LEDs) for their reduced footprint, allowing them to be easily separated from their substrate and embedded in a flexible matrix. In this review, the authors provide a comparison between the different geometries obtained by the growth of III-nitride structures for the fabrication of flexible devices. The processes used for their fabrication are then presented in detail. Last, an overview of the state of the art regarding flexible nanowire-based LED is provided, as well as some perspectives regarding their improvement.