A straightforward survey consisting of two or three questions is sufficient for determining the optimal size for users. Fit Predictor leverages the historical purchase data of customers to create a tailored Fit Profile that evolves as they continue shopping. This tool offers personalized sizing suggestions to all users, including those who lack Fit Profiles. Within seconds, Fit Predictor identifies the most suitable size for a customer by utilizing available data, eliminating the need for manual measurements. For new users without any prior shopping data, the service can estimate the best fit by analyzing the customer’s sizing with other brands. Currently, Fit Predictor is utilized by over 40 million individual users each month and is accessible in ten international markets, including the United States. It caters to more than 7,000 brands and has established a strong user base. Notably, this innovative technology has demonstrated its effectiveness in enhancing conversion rates while simultaneously decreasing return rates, making it a valuable asset for retailers. As it continues to develop, Fit Predictor aims to further personalize the shopping experience for each customer.