PT. XYZ is a company operating in the garment and textile industry in the city of Solo. In the Sewing division, there are busy work stations and idle times, then high waiting times and idle operators due to irregular workloads, so the concept of line balancing needs to be implemented to achieve company goals. The aim of this research is to determine the optimal number of work stations. The research method used is a qualitative data method, with data collection techniques using field research and observation. Based on the calculations that have been carried out in calculating the ranked positional weight, it is known that in the production line process, line 2A style MS LS Sewing Division has a takt time value of 94 seconds. After improvements were made to the production line with Line Balancing, which originally had 60 work stations, it became 35 work stations. The results for line efficiency, namely 80%, indicate that the ratio in making a series of assembly activities in the work station has a good percentage. Then the results obtained in the balance delay state that in organizing work assembly activities in the work station it is 20% while in the smoothness index the results obtained are 138.83 seconds