A single-mode fiber (SMF-28) based plasmonic design is optimized for enhanced light confinement and minimal mode area. The design incorporates a thin gold layer deposited onto the standard SMF-28 core at a specific distance and thickness. Numerical simulations analyze the impact of these parameters on the Confinement Factor (CF) and Mode Effective Area (MEA). Optimal metal thickness of 4.25 μm is achieved with a CF of 29.69% and MEA of 680.86 μm2. Optimal metal distance of 20 μm from the core center is achieved for high CF with low MEA. Analysis of the poynting vector confirms the dominant mode and its corresponding field components. This optimized plasmonic SMF-28 design offers a promising approach for plasmonic sensing and communication applications with minimal precious metal usage.