OFRoom is a technological solution for the e-commerce market, which solves the problem of choosing the right size of clothes / shoes by B2C clients. It is a database with the parameters of millions of people and a device which is a tool for filling and constantly updating the database. The problem is solved by eliminating the human factor both at the stage of determining the parameters and at the stage of deciding which size of clothes or shoes to choose in the Internet / store. Solution is based on a suit which takes the required number of customer measurements (up to 30) with an accuracy of 1 mm. Measurements are processed by OFRoom application, and placed in the online clothing / shoe store. System processes thousands of products and hide positions in the catalog that are not suitable for the client. The buyer will see only those products that exactly match his size, which will result in no waste of time and money on returns and exchanges of goods.