Origami principles can be efficiently exploited in the development of foldable structures when composite materials are used. In this study, glass fiber reinforced polymer composites (FRPCs) with dual-matrix system (epoxy-elastomer) was successfully used to manufacture folding hinge with four different sizes such as 3, 6, 9 and 12 mm. In addition, the glass fabric was coated with rGO to serve also as a piezoresistive sensor to monitor the folding and unfolding process. A cost-effective hot compression molding process was used to fabricate multiple samples in one batch and processing of laminate was monitored using in-situ measurement of resistance change. Then, the folding hinges were tested in single and 4 cycles tests. Moment-curvature and fractional changes in resistance (FCR) were simultaneously recorded in these tests. The results demonstrated that the folding region size in such structures plays a significant role in the electromechanical performance. Smaller folding region sizes of 3 mm and 6 mm demonstrated a higher value of FCR, and moment as compared to the 9 mm and 12 mm. It is concluded that these sizes shall be carefully selected in the design and development of origami-inspired deployable composite structures.