Wireless sensor networks (WSNs) have recently enabled many new applications often dubbed ”smart” as a result of it. And researchers are currently giving much attention to localization in WSNs for the increasing number its use cases in real life. Two main localization categories prevail in the literature: range-based and range-free. The latter exploit the networks connectivity information in order to approximate the nodes locations, while the former accomplishes that by measuring actual distances. One of the widely investigated range-free WSN localization techniques is the DV-Hop. In this paper, we will develop and analyze the performance of a new enhanced version of this reference technique using a novel weighted hop-size expression. The simulation results indicate an improvement of the performance in terms of accuracy.