In various embodiments, there are provided different methods of batch sizing. One method provides for the stylist having a matrix chart outlining as a percentage of or total amount of ingredients needed to create a mixture based on customer characteristics and/or service requested. In another method, batch sizing adjustment criteria includes a series of questions that provide user input. These methods enable the stylist to be capable of creating a more accurate batch sizing using the batch sizing adjustment criteria. The batch sizing of the formula may be performed by the stylist themselves or automatically done by a computer-driven system.