Scaling the voltage to the sub-threshold region is a convincing technique to achieve low power in digital circuits. The problem is that process variability severely impacts the performance of circuits operating in the sub-threshold domain. In this paper. we evaluate the sub-threshold sizing methodology of [1. https://www.diegojavierfares.com/discount-Los-Angeles-Rams-NFL-Womens-Bottom-Line-Crop-Top-p11321-best-save/