This study aims to determine the effect of firm size and financial performance consisting of current ratio, debt to equity ratio, total asset turnover, and return on assets on price to book value in telecommunications companies listed on the Indonesia Stock Exchange for the 2017-2022 period. The population of this study is telecommunications companies listed on the Indonesia Stock Exchange for the 2017-2022 period. This research is a quantitative study using a descriptive statistical approach with a total sample of 10 companies obtained using purposive sampling method and multiple linear regression analysis method. The results of this study are firm size, current ratio, and total asset turnover have no effect, while debt to equity ratio and return on assets have an effect on price to book value.