A flexible Laser reduced graphene oxide (LRGO) strain gauge formed on a polyethylene ‎terephthalate (PET) substrate is fabricated using a new technique suitable for large-scale and low-cost ‎mass production. The LRGO film is initially synthesized by drop-casting a graphene oxide (GO) solution ‎on a flexible PET substrate, followed by the simultaneous reduction and patterning of the dried film with ‎a 1.8 W carbon dioxide laser. The LRGO film is then characterized by X-ray Diffraction (XRD), ‎Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and scanning electron ‎microscope (SEM) techniques. A multilayer LRGO film with an estimated average thickness of 2.5 µm ‎and good adhesion to the PET substrate is obtained. The measured gauge factor of the LRGO strain ‎gauge is 61.5. ‎