Abstrac In order to improve production companies are laying out resources to minimize time and save the worker force in each workstation. It means the ergonomist specialist must choose the correct hand device according to each worker. The goal of this research is to set forth an instructions set for tool hand tools selection focused on anthropometrics of the workers in order to rise production using the adequate tool for the task. During the study, the anthropometrical data is processed and evaluated to obtain the dispersion population for each finger length and identified the main body size parameters for design tools. As a result, a methodical guide to help ergonomics team managers to make sure the correct and appropriate tool size selection to reduce the possibility of future illness for workers and the tailored ergonomic design of each workstation according to specific data for the worker.