Nowadays, study on the bistable composites due to the using of them in morphing structure has become more and more important. Unidirectional composites have different thermal expansion coefficients in longitudinal and transverse directions. This difference in thermal expansion coefficient is caused the composites to bend like bimetals due to the raise in temperature and bistable composites are derived. In this research, in order to study effects of fabrication method the square-shaped bistable composites laminates with asymmetric layers were prepared and investigated. Different kinds of bistable composite laminates were fabricated by thermoplastic PVC and glass fibers and the effects of composites laminate's dimensions and mold's temperature were investigated. The maximum height of the bistable composite laminate is selected as the output of experiments. The results derived from ANOVA analysis showed that the dimensions of the laminates has the highest effects on bistability height and the effects of mold temperature are very low. It was also determined that with the larger dimensions of composite laminates and lower mold's temperature, the heights of bistability were higher. Also, these bistable composite laminate were simulated in ABAQUS and the simulation results were compared with the experimental results. The results indicated that simulation method anticipated the higher bistability height rather than the experimental results and the difference between these results are less than 10% in all specimens.